NASA has selected 34 global volunteers to track the Orion spacecraft during the crewed Artemis II mission’s journey around the Moon.

The Artemis II test flight will launch NASA’s Space Launch System (SLS) rocket, carrying the Orion spacecraft and a crew of four astronauts, on a mission into deep space. The agency’s second mission in the Artemis campaign is a key step in NASA’s path toward establishing a long-term presence at the Moon and confirming the systems needed to support future lunar surface exploration and paving the way for the first crewed mission to Mars.

While NASA’s Near Space Network and Deep Space Network, coordinated by the agency’s SCaN (Space Communication and Navigation) program , will provide primary communications and tracking services to support Orion’s launch, journey around the Moon, and return to Earth, participants selected from a request for proposals published in August 2025, comprised of established commercial service providers, members of academia, and individual amateur radio enthusiasts will use their respective equipment to passively track radio waves transmitted by Orion during its approximately 10-day journey.

“The Artemis II tracking opportunity is a real step toward SCaN’s commercial-first vision. By inviting external organizations to demonstrate their capabilities during a human spaceflight mission, we’re strengthening the marketplace we’ll rely on as we explore farther into the solar system,” said Kevin Coggins, deputy associate administrator for SCaN at NASA Headquarters in Washington. “This isn’t about tracking one mission, but about building a resilient, public-private ecosystem that will support the Golden Age of innovation and exploration.”

These volunteers will submit their data to NASA for analysis, helping the agency better assess the broader aerospace community’s tracking capabilities and identify ways to augment future Moon and Mars mission support. There are no funds exchanged as a part of this collaborative effort.

This initiative builds on a previous effort in which 10 volunteers successfully tracked the Orion spacecraft during Artemis I in 2022. That campaign produced valuable data and lessons learned, including implementation, formatting, and data quality variations for Consultative Committee for Space Data Systems, which develops communications and data standards for spaceflight. To address these findings, SCaN now requires that all tracking data submitted for Artemis II comply with its data system standards.

Compared to the previous opportunity, public interest in tracking the Artemis II mission has increased. About 47 ground assets spanning 14 different countries will be used for to track the spacecraft during its journey around the Moon.   

Participants List:

Government:

• Canadian Space Agency (CSA), Canada
• The German Aerospace Center (DLR), Germany

Commercial:

• Goonhilly Earth Station Ltd, United Kingdom
• GovSmart, Charlottesville, Virginia
• Integrasys + University of Seville, Spain
• Intuitive Machines, Houston
• Kongsberg Satellite Services, Norway
• Raven Defense Corporation, Albuquerque, New Mexico
• Reca Space Agency + University of Douala, Cameroon
• Rincon Research Corporation & the University of Arizona, Tucson
• Sky Perfect JSAT, Japan
• Space Operations New Zealand Limited, New Zealand
• Telespazio, Italy
• ViaSat, Carlsbad, California
• Von Storch Engineering, Netherlands

Individual:

• Chris Swier, South Dakota
• Dan Slater, California
• Loretta A Smalls, California
• Scott Tilley, Canada

Academia:

• American University, Washington
• Awara Space Center + Fukui University of Technology, Japan
• Morehead State University, Morehead, Kentucky
• Pisgah Astronomical Research Institute, Rosman, North Carolina
• University of California Berkeley, Space Sciences Laboratory, California
• University of New Brunswick, ECE, Canada
• University of Pittsburgh, ECE, Pittsburgh
• University of Zurich – Physics Department, Switzerland

Non-Profit & Amateur Radio Organizations:

• AMSAT Argentina, Argentina
• AMSAT Deutschland, Germany
• Amateur Radio Exploration Ground Station Consortium, Springfield, Illinois
• CAMRAS, Netherlands
• Deep Space Exploration Society, Kiowa County, Colorado
• Neu Golm Ground Station, Germany
• Observation Radio Pleumur-bodou, France

Artemis II will fly around the Moon to test the systems which will carry astronauts to the lunar surface for economic benefits and scientific discovery in the Golden Age of exploration and innovation.

The networks supporting Artemis receive programmatic oversight from NASA’s SCaN Program office. In addition to providing communications services to missions, SCaN develops the technologies and capabilities that will help propel NASA to the Moon, Mars, and beyond. The Deep Space Network is managed by NASA’s Jet Propulsion Laboratory in Southern California, and the Near Space Network is managed by NASA’s Goddard Space Flight Center in Greenbelt, Maryland. 

Learn more about NASA’s SCaN Program:  

https://www.nasa.gov/scan

Listen to this audio excerpt from Dustin Gohmert, Orion Crew Survival System (OCSS) manager:

During NASA’s Artemis II mission around the Moon, the astronauts inside the Orion spacecraft will be wearing specialized pressure suits designed to protect them throughout their journey. At NASA’s Johnson Space Center in Houston, Dustin Gohmert leads the team responsible for these suits, known as the Orion Crew Survival System (OCSS).

“We work with the crew to say, ‘Here’s this design concept we have. How does this really work in the spaceflight environment?’” Gohmert said. “As we evolve the design, we take the crew’s input and we adapt the suit over time to take into account not only the desire we have for safety, but the real-world impacts that it has.”

The suits will protect astronauts on launch day, throughout high-risk parts of missions near the Moon, during the high-speed return to Earth, and in emergency situations if such events arise. The OCSS suits are engineered to sustain life for up to six days in the event of an emergency, and can provide the astronauts oxygen, hydration, food, and waste management needed on their way back to Earth.

“In an emergency, you’re essentially living in a personal spacecraft that’s only an inch bigger than your body,” Gohmert said. “That’s the reality of survival in space.”

Gohmert’s team in the Orion Crew Survival Systems Lab manages every phase of the suits, including processing, designing, qualifying, and testing them for the mission, as well as integrating them with the Orion spacecraft. Their work addresses engineering challenges, such as how much internal pressure the suit can safely maintain and for how long.

The team custom-builds each suit to fit the anatomy of the astronauts. Crew members undergo detailed sizing and multiple fit checks to ensure precision, and their feedback is a key part of the design evolution and refinement of the suit.

After earning his bachelor’s in mechanical engineering from the University of Texas at San Antonio and his master’s in engineering from the University of Texas at Austin, Gohmert joined United Space Alliance before becoming a NASA civil servant. He worked through the end of the Space Shuttle Program and later transitioned to Orion. Working on the suit throughout his career has been both technically challenging and a deeply personal responsibility.

As NASA prepares to explore deep space with Artemis II, Gohmert’s role will play a part in safely sending crew members around the Moon and returning them home.

“I was born after the last Moon landing,” he said. “To actually be a part of the next round is kind of overwhelming. It’s awe-inspiring in every possible way.”

As America approaches its 250th anniversary of declaring independence, NASA’s Artemis II mission will carry a host of mementos that reflect the nation’s long tradition of exploration, innovation, and leadership in its official flight kit. The items will fly aboard the Orion spacecraft, launched on top of the Space Launch System (SLS) rocket, as it carries four astronauts around the Moon on the first crewed test flight of the agency’s Artemis campaign.

“Historical artifacts flying aboard Artemis II reflect the long arc of American exploration and the generations of innovators who made this moment possible,” said NASA Administrator Jared Isaacman. “This mission will bring together pieces of our earliest achievements in aviation, defining moments from human spaceflight, and symbols of where we’re headed next. During America’s 250th anniversary, Orion will carry astronauts around the Moon while also carrying our history forward into the next chapter beyond Earth.”

Selected to honor America’s historic achievements in space, inspire the next generation of explorers, and reinforce U.S. leadership through international cooperation in science and education, the mementos continue a proud tradition carried forward from Artemis I and earlier human spaceflight missions. Together, they highlight the freedom and innovation that have unlocked the Golden Age of human space exploration.

A 1-inch by-1-inch swatch of muslin fabric from the original Wright Flyer the Wright Brothers used to make the first powered flight in 1903 will be flying aboard Artemis II, lent by the Smithsonian’s National Air and Space Museum. A smaller square cut of the swatch previously flew aboard space shuttle Discovery on STS-51D in 1985 and will make its second journey into space. After the mission, the fabric will be reunited with two other 1903 Wright Flyer swatches at the museum, celebrating the nation’s history and innovation in aviation.

Also flying aboard the Artemis II mission will be a 13-by-8-inch American flag, which flew with the first shuttle mission, STS-1, the final shuttle mission, STS-135, and NASA’s first crewed test flight of SpaceX’s Crew Dragon spacecraft, SpaceX Demo-2.

A flag that was set to fly on NASA’s Apollo 18 mission is included in the flight kit and will make its premiere flight with Orion. The flag serves as a powerful emblem of America’s renewed commitment to human exploration of the Moon, while honoring the legacy of the Apollo pioneers who first blazed the trail.

Orion also will carry a copy of a 4-by-5-inch negative of a photo from the Ranger 7 mission, the first U.S. mission to successfully make contact with the lunar surface. NASA’s Jet Propulsion Laboratory in California managed the Ranger series of spacecraft, built to help identify safe Moon landing sites for Apollo astronauts. The photo represents a major turning point in the race to the Moon that will be echoed today through the success of Artemis.

On Artemis I, a variety of tree seeds flew and were distributed to educational organizations and teachers after the mission, following in the footsteps of tree seeds flown aboard the Apollo 14 mission sprouted into “Moon Trees” after being returned to Earth. The seeds have since taken root at 236 locations across the U.S. to become their own Artemis I Moon Trees. Soil samples collected from the base of established Artemis I Moon Trees planted at NASA’s 10 centers will fly aboard Artemis II, representing the full cycle of exploration: launch, flight, growth, and return to space again. The CSA (Canadian Space Agency) will fly various tree seeds in the kit with the intention of distributing them after the mission.

Also included in the kit will be an SD card including the millions of names of those who participated in the “Send Your Name to Space” campaign, bringing the public along on this journey. The kit will include a variety of flags, patches, and pins to be distributed after the mission to stakeholders and employees who contributed to the flight. 

Additionally, NASA has included items from several of its partners in the kit. Stickers and patches from CSA will fly, and ESA (European Space Agency) will fly a flag in the kit for distribution after the mission, marking NASA’s international collaboration with other space agencies through Artemis. Orion’s European Service Module, the powerhouse of the spacecraft, is provided by ESA.

Carrying mementos on the NASA spacecraft has been a tradition since the 1960s, one that was continued on Artemis I, the first uncrewed test flight of Orion and the SLS. During this mission, Orion carried a symbolic flight kit including historical artifacts, from Apollo missions STEM, or science, technology, engineering, and math, items, digitized student essays and teacher pledges, and more.

The official flight kit for Artemis II, which contains about 10 pounds of mementos in total, augments important scientific research  aboard Orion.

This Jan. 17, 2026, image shows NASA’s SLS (Space Launch System) and Orion spacecraft rolling out of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. NASA’s massive Crawler-Transporter, upgraded for the Artemis program, carries the powerful SLS rocket and Orion spacecraft to Launch Pad 39B in preparation for the Artemis II mission.

Moving at a maximum speed of just 0.82 mph, the crawler carried the towering Moon rocket and spacecraft slowly but surely toward the pad, reaching its destination at 6:42 p.m. EST after a nearly 12-hour journey. The Artemis II test flight will send NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen on an approximately 10-day journey around the Moon and back. It is another step toward new U.S.-crewed missions to the Moon’s surface, leading to a sustained presence on the Moon that will help the agency prepare to send the first astronauts – Americans – to Mars.

See more photos from the rollout.

Image credit: NASA/Sam Lott

One year into President Donald J. Trump’s second term, NASA is delivering measurable progress across human spaceflight, science, aeronautics, and cutting-edge technology. These advances mark the beginning of a new Golden Age of American space leadership driven by clear national direction and historic investment through the Working Families Tax Cut Act.

Since his inauguration as the 47th President of the United States, NASA has sharpened its mission rooted in President Trump’s national space policy, reinforcing American superiority in space and accelerating progress across exploration, discovery, and innovation. With a renewed focus on human spaceflight, scientific excellence, and national capability, the agency is moving with clarity and momentum.

President Trump’s enduring commitment to space exploration has shaped every aspect of this progress. During his first term, the United States stood up the U.S. Space Force, commenced the Artemis campaign, established the Artemis Accords, which now have 60 signatories and are still growing, and returned American astronauts to human spaceflight from U.S. soil following the space shuttle era.

Now, with a clear National Space Policy and Working Family Tax Cut Act, NASA has the direction, resources, and authority to advance a bold vision for the future.

In the first year of the President’s second term, NASA has flown two human spaceflight missions, launched 15 science missions, and successfully test-flown a new X-plane, while accelerating work across lunar exploration, Earth science, planetary defense, next-generation aeronautics, and technologies to prepare for future missions to Mars.

Soon, NASA will launch the Artemis II mission, sending humans around the Moon for the first time in over 50 years, and setting the stage for America’s return to the lunar surface, but this time, to stay. These milestones reflect a workforce empowered to move faster, think bigger, and deliver results for the American people.

“In the first year of this administration, NASA has moved with clarity, purpose, and momentum, advancing President Trump’s bold vision for American leadership in space,” said NASA Administrator Jared Isaacman. “From strengthening our focus on human spaceflight and preparing for the first deep space exploration by NASA astronauts in more than half a century, to accelerating innovation across science, technology, and national capability, the President has provided the clearest executive direction for NASA since the Kennedy era. President Trump’s National Space Policy sharpened our mission, aligned our priorities, and empowered our workforce to move faster and think bigger. Because of that leadership, NASA is confidently delivering on a future of American space superiority for generations to come.”

NASA is positioned to build on this momentum. Under President Trump’s leadership, American astronauts will return to the surface of the Moon by 2028 and establish a sustained human presence with a lunar base. The agency will continue launching missions of science and discovery, including bringing the Nancy Grace Roman Space Telescope into operation before the end of the year. In line with the President’s vision, NASA is advancing nuclear power and propulsion technologies to enable deep space missions and transform what is possible for exploration.

With a focused mission, empowered workforce, and strong partnership with industry and international allies, NASA is entering the second year of President Trump’s second term positioned to change the world, extending American leadership in space and unlocking discoveries that will benefit humanity for decades to come.

For more information about NASA’s missions and programs, visit:

https://www.nasa.gov

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Bethany Stevens / George Alderman
Headquarters, Washington
771-216-2606 / 202-374-6002
bethany.c.stevens@nasa.gov / george.a.alderman@nasa.gov

NASA is weeks away from sending astronauts farther than any crew has traveled before, with the agency’s second mission in its Artemis campaign. The Artemis II Press Kit now is available with information on the mission, astronauts, and other resources for media.

“Artemis II will be a momentous step forward for human spaceflight. This historic mission will send humans farther from Earth than ever before and deliver the insights needed for us to return to the Moon — all with America at the helm,” said NASA Administrator Jared Isaacman. “Artemis II represents progress toward establishing a lasting lunar presence and sending Americans to Mars. I could not be more impressed by our NASA team and the Artemis II crew, and wish them well. Boldly forward.”

Under the Artemis campaign, NASA is returning humans to the Moon for economic benefits, scientific discovery, and to prepare for crewed missions to Mars.

To learn more about Artemis, visit:

https://www.nasa.gov/artemis

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Lauren Low / Rachel Kraft
Headquarters, Washington
202-358-1600
lauren.e.low@nasa.gov / rachel.h.kraft@nasa.gov  

NASA’s Crawler-transporter 2 moves toward the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on Friday, Jan. 9, 2026. The crawler will transport NASA’s SLS (Space Launch System) rocket with the Orion spacecraft to Launch Complex 39B ahead of the Artemis II launch which will journey Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth no later than April 2026.

The crawler-transporters have carried the load of taking rockets and spacecraft to the launch pad for more than 50 years at NASA’s Kennedy Space Center in Florida. Each the size of a baseball infield and powered by locomotive and large electrical power generator engines, the crawler-transporters stand ready to keep up the work for the next generation of launch vehicles to lift astronauts into space; Crawler-transporter 2 in particular is integral to the Artemis missions.

Image credit: NASA/Ben Smegelsky

NASA’s integrated SLS (Space Launch System) rocket and Orion spacecraft for the Artemis II mission is inching closer to launch – literally.

The agency is targeting no earlier than 7 a.m. EST, Saturday, Jan. 17, to begin the multi-hour trek from the Vehicle Assembly Building to Launch Pad 39B at NASA’s Kennedy Space Center in Florida.

A pre rollout mission news conference, live feed of rollout, and a media gaggle will stream on NASA’s YouTube channel. Individual streams for each of these events will be available from that page. Learn how to stream NASA content through a variety of online platforms, including social media.

The time of rollout is subject to change if additional time is needed for technical preparations or weather.

All times are Eastern. Events are as follows:

Friday, Jan. 16:

12 p.m.: Artemis II Rollout, Mission Overview News Conference

• John Honeycutt, Artemis II mission management team chair
• Charlie Blackwell-Thompson, Artemis launch director, Exploration Ground Systems
• Jeff Radigan, Artemis II lead flight director, Flight Operations Directorate
• Lili Villarreal, landing and recovery director, Exploration Ground Systems
• Jacob Bleacher, chief exploration scientist, Exploration Systems Development Mission Directorate

Saturday, Jan. 17:

7 a.m.: Rollout, Artemis II Live Views from Kennedy Space Center feed begins

9 a.m.: Artemis II Crew Rollout Media Event

• NASA Administrator Jared Isaacman and the Artemis II crew, including NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen, will answer questions about their preparations and the mission for media in-person at the countdown clock.

NASA’s crawler-transporter 2 will carry the 11-million-pound stack at about one mile per hour along the four-mile route from the Vehicle Assembly Building to Launch Pad 39B, on a journey that will take up to 12 hours.

To participate in the news conference by telephone, media must RSVP no later than two hours before the start to: ksc-newsroom@mail.nasa.gov. 

These events will be open in-person only to media previously credentialed for launch. The deadline has passed for in-person accreditation for Artemis II events at Kennedy.

Rollout to the pad marks another milestone leading up to the Artemis II mission. In the coming weeks, NASA will complete final preparations of the rocket and, if needed, rollback SLS and Orion to the Vehicle Assembly Building for additional work. While the Artemis II launch window opens as early as Friday, Feb. 6, the mission management team will assess flight readiness after the wet dress rehearsal across the spacecraft, launch infrastructure, and the crew and operations teams before selecting a launch date.

Follow NASA’s Artemis blog for mission updates.

Through Artemis, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and to build the foundation for the first crewed missions to Mars.

Learn more about Artemis at:

https://www.nasa.gov/artemis

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Rachel Kraft / Lauren Low
Headquarters, Washington
202-358-1600
rachel.h.kraft@nasa.gov / lauren.e.low@nasa.gov

Tiffany Fairley
Kennedy Space Center, Fla.
321-867-2468
tiffany.l.fairley@nasa.gov

Media accreditation is open to attend Artemis II mission activities at NASA’s Johnson Space Center in Houston. Johnson is where flight controllers in mission control will manage the test flight after liftoff of the first crewed Moon mission under the agency’s Artemis campaign.

Targeted to launch no earlier Friday, Feb. 6, the Artemis II mission will send NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen on an approximately 10-day journey around the Moon and back to test the systems and hardware, which will return humanity to the lunar surface.

After launch day, NASA will host daily briefings at Johnson throughout the mission with agency managers and mission experts. The briefings will be streamed on NASA’s YouTube channel.

International media without U.S. citizenship must apply to cover the mission in person at Johnson by 5 p.m. CST Friday, Jan. 16. U.S. media must apply by Friday, Jan. 30. Media representatives must apply by contacting the NASA Johnson newsroom at jsccommu@mail.nasa.gov. NASA’s media accreditation policy is available online.

Due to high interest, in-person space is limited. Credentialed media will receive a confirmation email if approved. Those who are accredited to attend the Artemis II launch at NASA’s Kennedy Space Center in Florida are not automatically accredited to attend events at Johnson and must receive a separate confirmation for activities in-person at NASA Johnson.

As part of a Golden Age of innovation and exploration, Artemis will pave the way for new U.S.-crewed missions on the lunar surface in preparation to send the first astronauts to Mars.

To learn more about the Artemis II mission, visit:

https://www.nasa.gov/mission/artemis-ii

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Rachel Kraft / Lauren Low
Headquarters, Washington
202-358-1600
rachel.h.kraft@nasa.gov / lauren.e.low@nasa.gov

Chelsey Ballarte
Johnson Space Center, Houston
281-483-5111
chelsey.n.ballarte@nasa.gov

Read this article in English here.

Conforme la NASA se acerca al lanzamiento del vuelo de prueba Artemis II, la agencia pronto llevará por primera vez su cohete Sistema de Lanzamiento Espacial (SLS, por sus siglas en inglés) y la nave espacial Orion a la plataforma de lanzamiento en el Centro Espacial Kennedy de la agencia en Florida para comenzar la integración final, las pruebas y los ensayos para el lanzamiento.

La NASA tiene como objetivo comenzar desde el sábado 17 de enero su traslado desde el Edificio de Ensamblaje de Vehículos hasta la Plataforma de Lanzamientos 39B, lo que tardará varias horas. El viaje de casi 6,5 kilómetros (cuatro millas) en el vehículo transportador oruga 2 podría durar hasta 12 horas. Los equipos técnicos están trabajando día y noche para dar por terminadas todas las tareas antes del transporte del cohete. Sin embargo, esta fecha objetivo está sujeta a cambios si fuera necesario tiempo adicional para los preparativos técnicos o debido a las condiciones meteorológicas.

“Nos estamos acercando a la misión Artemis II, y tenemos su lanzamiento a la vuelta de la esquina”, dijo Lori Glaze, administradora asociada interina para la Dirección de Misiones de Desarrollo de Sistemas de Exploración de la NASA. “Nos quedan pasos importantes en nuestro camino hacia el lanzamiento, y la seguridad de la tripulación seguirá siendo nuestra principal prioridad en todo momento, a medida que nos acercamos al regreso de la humanidad a la Luna”.

Al igual que con todos los nuevos desarrollos de sistemas complejos, los ingenieros han estado solucionando varios problemas en los últimos días y semanas. Durante las comprobaciones finales antes del traslado, los técnicos detectaron que un cable relacionado con el sistema de terminación de vuelo estaba doblado en contra de las especificaciones. El personal técnico lo está reemplazando y hará pruebas con el nuevo cable durante el fin de semana. Además, una válvula relacionada con la presurización de la escotilla de Orion presentó problemas que hicieron necesario llevar a cabo pruebas de demostración de la cuenta regresiva el 20 de diciembre pasado. El 5 de enero, el equipo reemplazó la válvula e hizo pruebas de su funcionamiento que resultaron exitosas. Los ingenieros también trabajaron para resolver fugas en el hardware de soporte en tierra que es necesario para cargar oxígeno gaseoso en Orion a fin de proporcionar aire respirable.

Traslado

Una vez que el cohete y la nave espacial integrados lleguen a la plataforma de lanzamiento, la NASA comenzará inmediatamente una larga lista de verificación para los preparativos en la plataforma de lanzamiento, incluyendo la conexión de equipos mecánicos de apoyo en tierra, como líneas eléctricas, conductos del sistema de control ambiental de combustible y tomas de surtido de combustible criogénico. Los equipos de personal técnico encenderán todos los sistemas integrados en la plataforma por primera vez para garantizar que los componentes del hardware de vuelo funcionen correctamente entre sí, con el lanzador móvil y con los sistemas de infraestructura terrestre.

Una vez que esté todo completado, los astronautas de Artemis II, Reid Wiseman, Victor Glover y Christina Koch de la NASA, y el astronauta de la CSA (Agencia Espacial Canadiense) Jeremy Hansen, llevarán a cabo una caminata final en la plataforma.

Ensayo general con circulación de combustible y llenado de tanques

A finales de enero, la NASA llevará a cabo un ensayo general con circulación de combustible, el cual es una prueba previa al lanzamiento para llenar los tanques de combustible en el cohete. Durante este ensayo general, el personal técnico hace una demostración de la capacidad de cargar más de 700.000 galones de combustible criogénico en el cohete, lleva a cabo una cuenta regresiva para el lanzamiento y practica la extracción segura del combustible del cohete sin tripulación presente en el sitio.

Durante el lanzamiento, el equipo de cierre, o de tareas finales, será responsable de asegurar a los astronautas en Orion y cerrar sus escotillas. El personal de cierre también utilizará este ensayo para practicar sus procedimientos de forma segura sin tener tripulación a bordo de la nave espacial.

El ensayo general con circulación de combustible incluirá varios “encendidos”, o pruebas de funcionamiento, para demostrar la capacidad del equipo de lanzamiento para detener, reanudar y reiniciar operaciones en varios momentos diferentes de los últimos 10 minutos de la cuenta regresiva, conocida como conteo terminal.

La ejecución del primer encendido comenzará aproximadamente en las 49 horas antes del lanzamiento, cuando los equipos encargados de lanzamiento son llamados a sus estaciones, hasta 1 minuto y 30 segundos antes del lanzamiento, seguido de una pausa planificada de tres minutos y luego la reanudación de la cuenta regresiva hasta 33 segundos antes del lanzamiento, el punto en el que el secuenciador de lanzamiento automático del cohete controlará los últimos segundos de la cuenta regresiva. Luego, los equipos técnicos volverán a reiniciar a T-10 minutos y detendrán el conteo, y luego reanudarán los procedimientos hasta 30 segundos antes del lanzamiento como parte de una segunda ejecución.

Si bien la NASA ha integrado las lecciones aprendidas con Artemis I en los procedimientos de la cuenta regresiva para el lanzamiento, la agencia hará una pausa para abordar cualquier problema durante la prueba o en cualquier otro momento si surgen retos técnicos. Los ingenieros vigilarán de cerca la carga de combustible de hidrógeno líquido y oxígeno líquido en el cohete, después de los desafíos que se encontraron con la carga de hidrógeno líquido durante los ensayos generales con circulación de combustible de Artemis I. Los equipos técnicos también prestarán mucha atención a la efectividad de los procedimientos recientemente actualizados para limitar la cantidad de nitrógeno gaseoso que se acumula en el espacio que está entre el módulo de tripulación de Orion y las escotillas del sistema de cancelación de lanzamiento, lo que podría representar un problema para el personal de cierre.

Es posible que se requieran ensayos generales con circulación de combustible adicionales para garantizar que el vehículo esté completamente revisado y apto para el vuelo.

De ser necesario, la NASA podría trasladar al cohete SLS y la nave Orion de vuelta al Edificio de Ensamblaje de Vehículos para realizar trabajos adicionales antes del lanzamiento después del ensayo general con circulación de combustible.

Próximos pasos para el lanzamiento

Después de un exitoso ensayo general con circulación de combustible, la NASA convocará una revisión de aptitud para el vuelo en la cual el equipo de gestión de la misión evaluará la aptitud de todos los sistemas, incluyendo el hardware de vuelo, la infraestructura y el personal de lanzamiento, vuelo y recuperación antes de comprometerse con una fecha de lanzamiento.

Aunque la ventana para el lanzamiento de Artemis II se podría iniciar tan pronto como el viernes 6 de febrero, el equipo de gestión de la misión evaluará la aptitud para el vuelo después del ensayo general con toda la nave espacial, la infraestructura de lanzamiento, y la tripulación y el personal de operaciones antes de seleccionar una fecha para el lanzamiento.

A fin de determinar las posibles fechas de lanzamiento, los ingenieros identificaron las restricciones clave necesarias para cumplir la misión y mantener a salvo a la tripulación dentro de Orion. Los períodos de lanzamiento resultantes son los días o las semanas en los que la nave espacial y el cohete pueden cumplir los objetivos de la misión. Estos períodos de lanzamiento explican la compleja mecánica orbital relacionada con el lanzamiento en una trayectoria precisa hacia la Luna mientras la Tierra rota sobre su eje y la Luna orbita la Tierra cada mes en su ciclo lunar. Esto da como resultado un patrón de alrededor de una semana de oportunidades de lanzamiento, seguido de tres semanas sin oportunidades de lanzamiento.

Existen varios parámetros principales que establecen la disponibilidad del lanzamiento dentro de estos períodos. Debido a su trayectoria única en relación con las misiones de alunizaje posteriores, estas limitaciones clave son exclusivas del vuelo de prueba de la misión Artemis II.

• El día y la hora de lanzamiento deben permitir que SLS pueda llevar a Orion a una órbita terrestre alta, donde la tripulación y los equipos técnicos en tierra evaluarán los sistemas de soporte vital de la nave espacial antes de que la tripulación emprenda su viaje con rumbo a la Luna.

• Orion también debe estar en la alineación adecuada con la Tierra y la Luna en el momento del encendido de motores con inyección translunar. El encendido de motores con inyección translunar de Artemis II pone a Orion en rumbo de sobrevolar la Luna, y también lo pone en una trayectoria de retorno libre, en la cual la nave espacial utiliza la gravedad de la Luna para enviar la nave espacial de regreso a la Tierra sin maniobras adicionales importantes de propulsión.

• La trayectoria para un día determinado debe garantizar que Orion no esté en la oscuridad durante más de 90 minutos a la vez para que las alas de los paneles solares puedan recibir y convertir la luz solar en electricidad, y la nave espacial pueda mantener un rango de temperatura óptimo. Los planificadores de la misión eliminan las posibles fechas de lanzamiento que llevarían a Orion a eclipses prolongados durante el vuelo.

• La fecha de lanzamiento debe sustentar una trayectoria que permita el perfil de entrada adecuado planificado durante el regreso de Orion a la Tierra.

Los períodos a continuación muestran la disponibilidad de llevar a cabo el lanzamiento hasta abril de 2026. Los planificadores de la misión mejoran estos períodos en función de un análisis actualizado más o menos dos meses antes de que estos comiencen, y ellos están sujetos a cambios.

Período de lanzamiento del 31 de enero al 14 de febrero

• Oportunidades de lanzamiento los días 6, 7, 8, 10 y 11 de febrero

Período de lanzamiento del 28 de febrero al 13 de marzo

• Oportunidades de lanzamiento los días 6, 7, 8, 9, 11 de marzo

Período de lanzamiento del 27 de marzo al 10 de abril

• Oportunidades de lanzamiento los días 1, 3, 4, 5, 6 de abril

Además de las oportunidades de lanzamiento basadas en la mecánica orbital y los requisitos de desempeño, también existen restricciones sobre qué días dentro de un período de lanzamiento pueden ser viables en función de la reposición de productos básicos, las condiciones meteorológicas y las operaciones de otros usuarios en el cronograma del Área Este. Como regla general, se pueden hacer hasta cuatro intentos de lanzamiento dentro de la semana aproximada de oportunidades que existen dentro de un período de lanzamiento.

Mientras la agencia se prepara para su primera misión tripulada más allá de la órbita terrestre en más de 50 años, la NASA espera aprender durante los procesos, tanto en tierra como en vuelo, y dejará que la aptitud y el desempeño de sus sistemas indiquen el momento en que la agencia está lista para el lanzamiento.

Como parte de una edad de oro de innovación y exploración, el vuelo de prueba de Artemis II, el cual tendrá una duración aproximada de 10 días, es el primer vuelo tripulado para la campaña Artemis de la NASA. Este es otro paso hacia nuevas misiones tripuladas de Estados Unidos en la superficie de la Luna, lo que llevará a una presencia sostenida en la Luna que ayudará a la agencia a prepararse para enviar a los primeros astronautas estadounidenses a Marte.

Encuentra más información sobre la campaña Artemis de la NASA en el siguiente sitio web (en inglés):

https://www.nasa.gov/artemis

Lee este artículo en español aquí.

As NASA moves closer to launch of the Artemis II test flight, the agency soon will roll its SLS (Space Launch System) rocket and Orion spacecraft to the launch pad for the first time at the agency’s Kennedy Space Center in Florida to begin final integration, testing, and launch rehearsals.

NASA is targeting no earlier than Saturday, Jan. 17, to begin the multi-hour trek from the Vehicle Assembly Building to Launch Pad 39B. The four-mile journey on the crawler-transporter-2 will take up to 12 hours. Teams are working around the clock to close out all tasks ahead of rollout. However, this target date is subject to change if additional time is needed for technical preparations or weather.

“We are moving closer to Artemis II, with rollout just around the corner,” said Lori Glaze, acting associate administrator for NASA’s Exploration Systems Development Mission Directorate. “We have important steps remaining on our path to launch and crew safety will remain our top priority at every turn, as we near humanity’s return to the Moon.”

As with all new developments of complex systems, engineers have been troubleshooting several items in recent days and weeks. During final checkouts before rollout, technicians found a cable involved in the flight termination system was bent out of specifications. Teams are replacing it and will test the new cable over the weekend. Additionally, a valve associated with Orion’s hatch pressurization exhibited issues leading up to a Dec. 20 countdown demonstration test. On Jan. 5, the team successfully replaced and tested it. Engineers also worked to resolve leaky ground support hardware required to load gaseous oxygen into Orion for breathing air. 

Rollout

Once the integrated rocket and spacecraft reach the launch pad, NASA will immediately begin a long checklist of launch pad preparations, including connecting ground support equipment such as electrical lines, fuel environmental control system ducts, and cryogenic propellant feeds. Teams will power up all integrated systems at the pad for the first time to ensure flight hardware components are functioning properly with each other, the mobile launcher, and ground infrastructure systems.

Once complete, the Artemis II astronauts, NASA’s Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen, will conduct a final walkdown at the pad.

Wet dress rehearsal, tanking

At the end of January, NASA will conduct a wet dress rehearsal, which is a prelaunch test to fuel the rocket. During wet dress, teams demonstrate the ability to load more than 700,000 gallons of cryogenic propellants into the rocket, conduct a launch countdown, and practice safely removing propellant from the rocket without astronauts onsite.

During launch, a closeout crew will be responsible for securing astronauts in Orion and closing its hatches. The closeout crew also will use this rehearsal to practice their procedures safely without astronauts aboard the spacecraft.

The wet dress rehearsal will include several “runs” to demonstrate the launch team’s ability to hold, resume, and recycle to several different times in the final 10 minutes of the countdown, known as terminal count.

The first run will begin approximately 49 hours before launch when launch teams are called to their stations, to 1 minute 30 seconds before launch, followed by a planned three-minute hold and then countdown resumption to 33 seconds before launch – the point at which the rocket’s automatic launch sequencer will control the final seconds of the countdown. Teams then will recycle back to T-10 minutes and hold, then resume down to 30 seconds before launch as part of a second run.

While NASA has integrated lessons learned from Artemis I into the launch countdown procedures, the agency will pause to address any issues during the test or at any other point should technical challenges arise. Engineers will have a close eye on propellant loading of liquid hydrogen and liquid oxygen into the rocket, after challenges encountered with liquid hydrogen loading during Artemis I wet dress rehearsals. Teams also will pay close attention to the effectiveness of recently updated procedures to limit how much gaseous nitrogen accumulates in the space between Orion’s crew module and launch abort system hatches, which could pose an issue for the closeout crew.

Additional wet dress rehearsals may be required to ensure the vehicle is completely checked out and ready for flight.

If needed, NASA may rollback SLS and Orion to the Vehicle Assembly Building for additional work ahead of launch after the wet dress rehearsal.

Next steps toward launch

Following a successful wet dress rehearsal, NASA will convene a flight readiness review where the mission management team will assess the readiness of all systems, including flight hardware, infrastructure, and launch, flight, and recovery teams before committing to a launch date.

While the Artemis II launch window opens as early as Friday, Feb. 6, the mission management team will assess flight readiness after the wet dress rehearsal across the spacecraft, launch infrastructure, and the crew and operations teams before selecting a launch date.

To determine potential launch dates, engineers identified key constraints required to accomplish the mission and keep the crew inside Orion safe. The resulting launch periods are the days or weeks where the spacecraft and rocket can meet mission objectives. These launch periods account for the complex orbital mechanics involved in launching on a precise trajectory toward the Moon while the Earth is rotating on its axis and the Moon is orbiting Earth each month in its lunar cycle. This results in a pattern of approximately one week of launch opportunities, followed by three weeks without launch opportunities.

There are several primary parameters that dictate launch availability within these periods. Because of its unique trajectory relative to subsequent lunar landing missions, these key constraints are unique to the Artemis II test flight.

• The launch day and time must allow SLS to be able to deliver Orion into a high Earth orbit where the crew and ground teams will evaluate the spacecraft’s life support systems before the crew ventures to the Moon.
• Orion also must be in the proper alignment with the Earth and Moon at the time of the trans-lunar injection burn. The Artemis II trans-lunar injection burn places Orion on course to flyby the Moon, and also sets it on a free return trajectory, in which the spacecraft uses the Moon’s gravity to send the spacecraft back to Earth without additional major propulsive maneuvers. 
• The trajectory for a given day must ensure Orion is not in darkness for more than 90 minutes at a time so that the solar array wings can receive and convert sunlight to electricity, and the spacecraft can maintain an optimal temperature range. Mission planners eliminate potential launch dates that would send Orion into extended eclipses during the flight.
• The launch date must support a trajectory that allows for the proper entry profile planned during Orion’s return to Earth.

The periods below show launch availability through April 2026. Mission planners refine the periods based on updated analysis approximately two months before they begin and are subject to change. 

Launch Period Jan. 31 – Feb. 14

• Launch opportunities February 6, 7, 8, 10, and 11

Launch Period Feb. 28 – March 13

• Launch opportunities March 6, 7, 8, 9, 11

Launch Period March 27 – April 10

• Launch opportunities April 1, 3, 4, 5, 6

In addition to the launch opportunities based on orbital mechanics and performance requirements, there are also limitations on which days within a launch period can be viable based on commodity replenishment, weather, and other users on the Eastern Range schedule. As a general rule, up to four launch attempts may be attempted within the approximate week of opportunities that exist within a launch period.

As the agency prepares for its first crewed mission beyond Earth orbit in more than 50 years, NASA expects to learn along the way, both on the ground and in flight, and will let the readiness and performance of its systems dictate when the agency is ready to launch.

As part of a Golden Age of innovation and exploration, the approximately 10-day Artemis II test flight is the first crewed flight under NASA’s Artemis campaign. It is another step toward new U.S.-crewed missions to the Moon’s surface, leading to a sustained presence on the Moon that will help the agency prepare to send the first astronauts – Americans – to Mars.

Learn more about NASA’s Artemis campaign:

https://www.nasa.gov/artemis

Artemis II crewmembers (left to right) NASA astronauts Christina Koch, mission specialist; and Victor Glover, pilot; CSA (Canadian Space Agency) astronaut Jeremy Hansen, mission specialist; and NASA astronaut Reid Wiseman, commander are led by Bill Owens of the Closeout Crew from the elevator at the 275-foot level of the mobile launcher to the crew access arm as they prepare to board their Orion spacecraft atop NASA’s Space Launch System rocket during the Artemis II countdown demonstration test, Saturday, Dec. 20, 2025, inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. For this operation, the Artemis II crew and launch teams are simulating the launch day timeline including suit-up, walkout, and spacecraft ingress and egress.

Through the Artemis campaign, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and to build the foundation for the first crewed missions to Mars, for the benefit of all.

This image was chosen by NASA’s Headquarters photo team as one of the best of 2025.

Image credit: NASA/Joel Kowsky

Listen to this audio excerpt from Jacki Mahaffey, Artemis II chief training officer:

When the Artemis II crew travels around the Moon aboard the Orion spacecraft, they will have spent countless hours training for their lunar mission, and Jacki Mahaffey will have played a role in preparing them for their journey.

As the Artemis II chief training officer at NASA’s Johnson Space Center in Houston, Mahaffey manages the planning, development, and implementation of the astronauts’ training and integrated simulations. Her job is to ensure that when the Artemis II crew travels around the Moon inside Orion, the astronauts and flight controllers are ready for every moment — expected and unexpected.

The Artemis II crew began their rigorous training in 2023, but the work of Mahaffey and her team started long before that. Years before the training began, her team gathered the experts on how to operate the different aspects of Orion, and what the crew will need to know to execute their mission.

“One of my favorite moments from that process was when we all got together in one room, and everyone brought a piece of paper for every single lesson or training event that they expected to do with the crew,” Mahaffey said. “And we laid the entire thing out to figure out what’s the most logical order to put all of this training in, to help build that big picture for the crew.”

Training for Artemis II began shortly after the crew was announced, with Mahaffey and her team introducing the astronauts to Orion’s systems and operational basics. Once the necessary simulators and mockups were ready, the crew transitioned into hands-on training to build familiarity with their spacecraft.

At Johnson, Mahaffey’s team utilizes a range of specialized facilities, including the Space Vehicle Mockup Facility, where astronauts rehearse living and working inside the Orion mockup; the Orion Mission Simulator, which replicates flight software and displays; and the Neutral Buoyancy Laboratory, where the crew practices water survival techniques for post-splashdown scenarios.

“We try to simulate as much as we can here on Earth,” said Mahaffey. “But we still have gravity, so we rely on the crew’s experience to imagine how they’ll use the space in microgravity”

Three of the four Artemis II astronauts have flown in space before, and Mahaffey sees their experience as a powerful asset. They bring insights that shape procedures and training plans, and they learn from each other’s unique problem-solving styles.

“They are teaching us back about how to have that crew perspective of working in space and the things that are going to matter most,” she said.

Mahaffey’s journey began with a love for engineering and a role as a flight controller in Johnson’s Mission Control Center. She found joy in training others and eventually transitioned into a full-time training role. Now, she leads a team of about 100 contributors, all working to prepare the crew for their historic mission.

“I didn’t start out wanting to be a trainer — I studied engineering because I loved physics and math,” she said. “But as the job shifted toward applying that engineering knowledge, communicating, and planning how to operate a spacecraft, the natural next step was teaching others.”

For Mahaffey, Artemis is a bridge connecting her family’s legacy with the future of space exploration. Her grandfather worked on control systems for Apollo, and she sees her work as a continuation of that story, now with more advanced technology and new frontiers. 

“We’re doing some of the same things Apollo did, but expanding on them,” she said. “We’re learning more about the Moon, our Earth’s history, and how we’ll get to Mars.” 

Her role during Artemis II also includes serving as an Artemis capcom, short for capsule communicator, the position in mission control that directly communicates with the crew members. Mahaffey plans to work the entry shift for Artemis II — helping to guide the crew to splashdown and ensuring their safe recovery. The moment will be a culmination of her entire team’s hard work. 

“I’ll feel good when the recovery forces report that the hatch is open,” Mahaffey said. “That moment will be incredible.” 

Listen to this audio excerpt from Jen Madsen and Trey Perryman, leads of the Orion Mission Evaluation Room for the Artemis II mission:

During NASA’s Artemis II mission, Jen Madsen and Trey Perryman will be leading a team monitoring the Orion spacecraft as it carries four astronauts around the Moon. The team works in the Orion Mission Evaluation Room where they will monitor and analyze Orion’s systems and performance in real time to help ensure crew safety and mission success.

As the leaders of the Orion Mission Evaluation Room located inside the Mission Control Center at NASA’s Johnson Space Center in Houston, Madsen and Perryman are responsible for ensuring that the dozens of NASA, Lockheed Martin, ESA (European Space Agency), and Airbus expert engineers that staff the room’s consoles are ready for Artemis II.

The flight control team operating Orion from mission control’s White Flight Control Room will rely on the Mission Evaluation Room’s crucial findings to help with unexpected spacecraft behaviors that may arise and help analyze Orion’s performance data during the mission.

With crew aboard Orion, Artemis II brings new challenges, new opportunities, and a new space in mission control for the Orion Mission Evaluation Room. More spacecraft systems will be put to the test, requiring more evaluation room expertise and new consoles to monitor systems not previously flown, like life support.

“There’s loads of excitement — for the new capabilities, the mission, and having a new, wonderful space to operate in,” said Perryman.

Besides leading the Mission Evaluation Room, Perryman is also the lead for Orion Mission and Systems Integration, and Madsen is deputy manager for Orion’s Avionics, Power, and Software. Their co-leadership styles complement each other — Perryman leads with energy and team spirit, while Madsen brings a steadiness and structure.

“We balance each other out,” Madsen said. “And that balance is reflected in our team.”

For Perryman, a former flight controller with a background in space shuttle and space station operations, the MER represents the culmination of a career in human spaceflight that’s personal.

“I couldn’t imagine being anywhere else right now,” Perryman said. “My wife and I have four boys, and my boys are very excited about Artemis…that’s meaningful to me. And they like seeing a father who’s really connected to this mission.”

Madsen began her NASA career in engineering, designing and simulating Orion’s guidance, navigation, and control systems early on in the program.

For both leaders, the Artemis II mission is more than technical. With crew flying aboard the spacecraft, it’s deeply human.

“I do feel an extra sense of importance and mindfulness about what we’re doing in this building,” Perryman said,  “making sure — specifically in the Orion MER — that we understand how the vehicle supports the crew, because it is so important to return them home safely.”

“We all feel like Reid, Victor, Christina, and Jeremy are part of the Orion family,” Madsen said. “When we have discussions about risk, from design all the way through operations, we’re thinking about our friends aboard the spacecraft.”

Santa Claus (NASA engineer Guy Naylor) poses with NASA’s Artemis II Orion spacecraft and SLS (Space Launch System) rocket in the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on Dec. 11, 2025. The Orion spacecraft was stacked atop the SLS in October 2025.

Set to launch in early 2026, the Artemis II test flight will be NASA’s first mission with crew under Artemis. Astronauts on their first flight aboard Orion will confirm all the spacecraft’s systems operate as designed with crew aboard in the actual environment of deep space. Through the Artemis campaign, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and to build the foundation for the first crewed missions to Mars – for the benefit of all.

Image credit: NASA/Adeline Morgan

For most, getting into a car is a task that can be done without assistance. Yet for those whose destination is the Moon, the process of getting inside and secured – in this case, in NASA’s Orion spacecraft – requires help. That’s the role of the Artemis closeout crew.

Trained to support Artemis II and future Moon missions, the five closeout crew members will be the last people to see NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen before their lunar journey.

The Artemis II closeout team consists of a lead, Taylor Hose; an astronaut support person, astronaut Andre Douglas; one technician specially trained on Orion crew survival system spacesuits, Bill Owens; and two Orion technicians, Christian Warriner and Ricky Ebaugh.

Think of them like a pit crew for car races.

When the astronauts arrive on launch day at Launch Complex 39B at NASA’s Kennedy Space Center in Florida, the closeout crew will already be in place. First, the team will help the astronauts don their helmets and gloves before entering the Orion spacecraft.

Once inside, Owens and Douglas will assist each crew member with buckling up – except instead of using just one seatbelt like in a car, the crew needs several more intricate connections. Each seat includes five straps to secure the astronauts inside the crew module and several additional connections to the environmental control and life support systems and communications system aboard.

After the astronauts are secured, the hatch technicians will begin closing the spacecraft hatch. Unlike a car door that easily opens and closes with the pull of a handle, Orion’s hatch requires more effort to securely close.

“The hatch is pneumatically driven so we have to have air lines hooked up to it, and we need the help of the ground support system to close it,” said Hose.

On launch day, it will take about four hours for the crew to get situated inside Orion and for the closeout process, including buttoning up both the crew module hatch and an exterior launch abort system hatch, to be complete. Even a single strand of hair inside the hatch doors could potentially pose issues with closing either hatch, so the process is carefully done.

“We have a lot of work to do with the seals alone – greasing, cleaning, taking the hatch cover off – and then we get into crew module hatch closure,” Hose said. “So after latching the hatch, we take window covers off, install thermal protection panels, and remove the purge barrier in between the vehicle and the ogive panels, which help protect the crew module during launch and ascent.”

The team then closes the launch abort system hatch and finishes final preparations before launch. Following the abort system hatch closure, the closeout crew departs the launch pad but stays nearby in case they need to return for any reason.

After launch, several team members will head to San Diego, to help with post-splashdown efforts once the mission concludes.

As part of a Golden Age of innovation and exploration, the Artemis II test flight is the first crewed flight under NASA’s Artemis campaign. It is another step toward new U.S.-crewed missions on the Moon’s surface that will help the agency prepare to send the first astronauts – Americans – to Mars.

From left to right, CSA (Canadian Space Agency) astronaut Jeremy Hansen and NASA astronauts Christina Koch, Victor Glover, and Reid Wiseman stand outside before boarding their Orion spacecraft inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida as part of the Artemis II countdown demonstration test, Saturday, Dec. 20, 2025. Because the SLS (Space Launch System) rocket upon which they will launch is not yet at the launch pad, the crew boarded Orion inside NASA Kennedy’s Vehicle Assembly Building, where engineers are conducting final preparations on the spacecraft, rocket, and ground systems. During the rehearsal, teams went through all the steps that will be taken on launch day, winding the clock down to just a few seconds before liftoff.

Through the Artemis campaign, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and to build the foundation for the first crewed missions to Mars, for the benefit of all.

See more photos from the countdown demonstration test.

Image credit: NASA/Aubrey Gemignani

NASA’s launch and mission teams, along with the Artemis II crew, completed a key test Dec. 20, a countdown demonstration test, ahead of the Artemis II flight around the Moon early next year. The astronauts, supported by launch and flight control teams, dressed in their launch and entry suits, boarded their spacecraft on top of its towering rocket at the agency’s Kennedy Space Center in Florida to validate their launch date timeline.

Winding the clock down to a point just before liftoff, the rehearsal enabled NASA teams to practice the exact steps teams will take as they move toward launch of the test flight.

While launch teams in the firing rooms of Kennedy’s Launch Control Center ran through procedures just as they would on launch day, the Artemis II crew members – NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen – donned their Orion crew survival system spacesuits in the Astronaut Crew Quarters inside Kennedy’s Neil A. Armstrong Operations and Checkout Building.

Once suited, the crew made the same walk taken by Gemini, Apollo, space shuttle, and Commercial Crew Program astronauts launching from Florida’s Space Coast during the last six decades. Through the suit-up room, down the hallway, and after a quick ride on an elevator, the Artemis II crew exited the building through the double doors featuring dozens of human spaceflight mission patch stickers.

The Artemis astronaut van waited outside to take the crew members to their SLS (Space Launch System) rocket. On the actual launch day, the four astronauts will complete a 20-minute ride to Kennedy’s Launch Complex 39B ahead of liftoff. But, for the countdown test the destination was High Bay 3 of Kennedy’s Vehicle Assembly Building, where the Artemis II Moon rocket is undergoing final processing and checkouts before rolling out to the launch pad. A convoy of support vehicles, as well as Artemis II backup crew members, NASA astronaut Andre Douglas and CSA astronaut Jenni Gibbons, escorted the crew to its destination.

After a short trip to the building, the flight crew rode the mobile launcher’s elevator up nearly 300 feet to the crew access arm and the White Room, the enclosed area where the crew enters the spacecraft. The closeout crew, whose job it is to ensure the flight crew enters the spacecraft without issue, helped the astronauts enter Orion, which they have named Integrity. The closeout team assisted the astronauts by strapping them into their seats and closed the hatch once all closeout operations were completed. With the crew secured in Orion, teams conducted suit leak and communications checks, just as they will on launch day.

Throughout the testing, teams ran through the final 5.5 hours of launch day procedures, completing the countdown test about 30 seconds before what will be the time of liftoff on launch day. As they may encounter on launch day, teams navigated through several real-time issues, including audio communications and environmental control and life support systems closeout activities during the test. All objectives were met, and the countdown demonstration provided a valuable opportunity to conduct operations in a day-of-launch configuration to minimize first-time learnings on launch day.

Although Artemis II teams have performed parts of the launch countdown testing previously, this test was the first full end-to-end rundown with the crew and Orion in the launch configuration. The crew will participate in additional countdown testing after the rocket arrives to the launchpad, focusing on emergency operations.

As part of a Golden Age of innovation and exploration, the Artemis II test flight is the first crewed mission under NASA’s Artemis campaign. It is another step toward new U.S.-crewed missions on the Moon’s surface that will help the agency prepare to land American astronauts on Mars.

Teams at NASA’s Kennedy Space Center in Florida spent 2025 preparing the launch vehicle and its powerhouse SLS (Space Launch System) rocket to launch four astronauts around the Moon for Artemis II in early 2026. The center also celebrated milestones by conducting science experiments at the International Space Station to studying the Sun’s solar wind impacts on Earth to traveling to Mars in hopes of one day exploring the Red Planet in person.

JANUARY
NASA Kennedy Marks New Chapter for Florida Space Industry 

Kennedy Space Center Director Janet Petro and charter members of the Florida University Space Research Consortium sign a memorandum of understanding in research and development to assist with missions and contribute to NASA’s Moon to Mars exploration approach. 

Firefly Launches Blue Ghost Mission One 

Firefly Aerospace launched Blue Ghost Mission One lunar lander with a suite of NASA scientific instruments on January 15, from Launch Complex 39A at NASA Kennedy. The lander and instruments landed March 2 on the Moon. 

FEBRUARY
Intuitive Machines Launches to the Moon

Intuitive Machines’ IM-2 Nova C lunar lander launched Feb. 26 from Launch Complex 39A, carrying NASA science and technology demonstrations to the Mons Mouton region of the Moon. IM-2 reached the surface of the Moon on March 6. 

MARCH
NASA’s SpaceX Crew-10 Launch

NASA astronauts Anne McClain and Nicole Ayers, JAXA (Japan Aerospace Exploration Agency) Takuya Onishi, and Roscosmos cosmonaut Kirill Peskov launched March 14 from Launch Complex 39A to the International Space Station for a five-month science mission. 

NASA’s SPHEREx, PUNCH Missions Launch 

A SpaceX Falcon 9 rocket launched on March 11, from Space Launch Complex 4 East at Vandenberg Space Force Base in California carrying NASA’s SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) and PUNCH (Polarimeter to Unify the Corona and Heliosphere) missions. NASA’s Launch Services Program, based at NASA Kennedy managed the launch service for SPHEREx.

NASA’s SpaceX Crew-9 Returns 

NASA astronauts Nick Hague, Suni Williams, and Butch Wilmore were greeted by dolphins and recovery teams after their SpaceX Dragon spacecraft splashed down on March 18, off the coast of Tallahassee, Florida following their long-duration mission at the International Space Station. 

NASA Causeway Bridge Opens 

The Florida Department of Transportation opened the westbound portion of the NASA Causeway Bridge on March 19, completing construction in both directions spanning the Indian River Lagoon and connecting NASA Kennedy and Cape Canaveral Space Force Station to the mainland. 

NASA Artemis Teams Complete URT-12 

Teams from NASA and the Department of War train during a week-long Underway Recovery Test-12 in March off the coast of California for Artemis II test flight crewmembers and the Orion spacecraft. The series of tests demonstrate and evaluate the processes, procedures, and hardware used in recovery operations for crewed lunar missions.

APRIL  
NASA’s SpaceX 32nd Commercial Resupply Mission 

A SpaceX Falcon 9 rocket and a Dragon spacecraft carrying nearly 6,700 pounds of scientific investigations, food, supplies, and equipment launched on April 21 from Launch Complex 39A to the International Space Station. 

JULY
Artemis III Begins Processing

NASA’s Artemis III SLS engine section and boat-tail made the journey from the Space Systems Processing Facility at NASA Kennedy to the spaceport’s Vehicle Assembly Building in July to complete integration and check-out testing. Beginning with the Artemis III hardware, NASA moved certain operations to NASA Kennedy to streamline the manufacturing process and enable simultaneous production operations of two core stages.

AUGUST 
NASA’s SpaceX Crew-11 Launches 

NASA astronauts Zena Cardman and Mike Fincke, JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui, and Roscosmos cosmonaut Oleg Platonov launched aboard a SpaceX Dragon spacecraft and its Falcon 9 rocket on Aug. 1 from Launch Complex 39A bound for a long-duration mission to the International Space Station. 

NASA’s SpaceX Crew-10 Returns 

NASA astronauts Anne McClain and Nicole Ayers, JAXA (Japan Aerospace Exploration Agency) astronaut Takuya Onishi, and Roscosmos cosmonaut Kirill Peskov became the first Commercial Crew to splash down in the Pacific Ocean off the coast of California on Aug. 9, completing their nearly five-month mission at the orbiting outpost as part of the agency’s Commercial Crew Program. 

NASA’s SpaceX 33rd Commercial Resupply Mission 

A SpaceX Falcon 9 launched the company’s Dragon spacecraft carrying more than 5,000 pounds of food, crew supplies, science investigations, spacewalk equipment, and more to the space station on Aug. 24 from Launch Complex 39A. 

Orion Tested, Stacked With Hardware

Teams transported NASA’s Orion spacecraft from Kennedy’s Multi-Payload Processing Facility to the Launch Abort System Facility in August where crews integrated the 44-foot-tall launch abort system. The Orion spacecraft will send NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen around the Moon for the Artemis II mission in early 2026. The launch abort system is designed to carry the crew to safety in the event of an emergency atop the SLS.

SEPTEMBER
NASA Launches IMAP Mission

NASA’s IMAP (Interstellar Mapping and Acceleration Probe) launched from Launch Complex 39A on Sept. 24, to help researchers better understand the boundary of the heliosphere, a huge bubble created by the Sun surrounding and protecting our solar system.

NASA’s Northrop Grumman Commercial Resupply Mission 

A Northrop Grumman Cygnus XL spacecraft atop a SpaceX Falcon 9 rocket lifted off from Launch Complex 39A to the International Space Station delivering NASA science investigations, supplies, and equipment as part of the agency’s partnership to resupply the orbiting laboratory.  

OCTOBER
Orion Integrated With SLS Rocket

Teams stacked NASA’s Orion spacecraft with its launch abort system on the agency’s SLS rocket in High Bay 3 of the Vehicle Assembly Building at NASA Kennedy on Oct. 20 for the agency’s Artemis II mission. Teams will begin conducting a series of verification tests ahead of rolling out the integrated SLS rocket to Launch Complex 39B for the wet dress rehearsal.

NOVEMBER
NASA’s ESCAPADE Begins Journey to Mars

NASA’s ESCAPADE (Escape and Plasma Acceleration and Dynamics Explorers) twin spacecraft launched aboard Blue Origin’s New Glenn rocket on Nov. 13 from Launch Complex 36 at Cape Canaveral Space Force Station. Its twin orbiters will take simultaneous observations from different locations around Mars to reveal how the solar wind interacts with Mars’ magnetic environment and how this interaction drives the planet’s atmospheric escape.

NASA, European Partners Launch Sea Satellite

A SpaceX Falcon 9 rocket carrying the U.S.-European Sentinel-6B satellite launched at Nov. 16 from Space Launch Complex 4 East at Vandenberg Space Force Base in California. Sentinel-6B will observe Earth’s ocean, measuring sea levels to improve weather forecasts and flood predictions, safeguard public safety, benefit commercial industry, and protect coastal infrastructure.

DECEMBER

NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA astronaut Jeremy Hansen participated in a dry dress rehearsal at NASA Kennedy on Dec. 20 to mimic launch day operations for the Artemis II launch. The crew donned their spacesuits, exited the Neil A. Operations and Checkout Building, and took the journey to the Vehicle Assembly Building, up the mobile launcher to the crew access arm, and entered the Orion spacecraft that will take them around the Moon and back to Earth.

The four astronauts set to fly around the Moon during NASA’s Artemis II test flight depart the Neil A. Armstrong Operations and Checkout Building at the agency’s Kennedy Space Center in Florida, during a dress rehearsal for launch day on Dec. 20, 2025. From left are CSA (Canadian Space Agency) astronaut Jeremy Hansen, NASA astronauts Victor Glover, Reid Wiseman, and Christina Koch.

The launch day rehearsal, called a countdown demonstration test, simulated the launch day timeline, including the crew suiting up in their spacesuits and climbing in and out of their Orion spacecraft. Because the SLS (Space Launch System) rocket upon which they will launch is not yet at the launch pad, the crew boarded Orion inside Kennedy’s Vehicle Assembly Building, where engineers are conducting final preparations on the spacecraft, rocket, and ground systems.  

Through Artemis, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and build the foundation for the first crewed missions to Mars.

Photo Credit: NASA/Jim Ross