The Atacama Cosmology Telescope in Chile not only confirmed one of the greatest mysteries in the universe—it also ruled out dozens of models that attempted to solve it.

NASA’s broadcast of the April 8, 2024, total solar eclipse has won an Emmy Award for Excellence in Production Technology.

At the 76th Technology & Engineering Emmy Awards on Dec. 4, in New York City, the Academy of Television Arts & Sciences announced the win. Walt Lindblom and Sami Aziz accepted the award on behalf of the agency. For the broadcast, Lindblom served as the coordinating producer and Aziz served as the executive producer.

“By broadcasting the total solar eclipse, this team brought joy and wonder for our Sun, Moon, and Earth to viewers across America and the world,” said Will Boyington, associate administrator for the Office of Communications at NASA Headquarters in Washington. “Congratulations to the production team, whose efforts demonstrate the hard work and dedication to the sharing the marvel that makes our solar system something we strive to understand.” 

NASA’s live broadcast coverage of the 2024 total solar eclipse was the most complex live project ever produced by the agency. In total, NASA’s eclipse broadcasts garnered almost 40 million live and replay views across its own distribution channels, including on NASA+, the agency’s free streaming service. Externally, the agency’s main broadcast was picked up in 2,208 hits on 568 channels in 25 countries.

“Our unique place in the solar system allows us on Earth to witness one of the most spectacular science shows nature has to offer. NASA’s production team captured the action every step of the way across the path of totality, including the rare glimpse of the Sun’s corona,” said Nicky Fox, associate administrator for science at NASA Headquarters. “Congratulations to the NASA team for successfully showing the 2024 total solar eclipse through the eyes of NASA for the whole world to experience together.”

The broadcast spanned three hours, showcasing the eclipse across seven American states and two countries. From cities, parks, and stadiums, 11 hosts and correspondents provided on air commentary, interviews, and live coverage. Viewers tuned in from all over the world, including at watch parties in nine locations, from the Austin Public Library to New York’s Times Square. An interactive “Eclipse Board” provided real time data analysis as the Moon’s shadow crossed North America.

Live feeds from astronauts aboard the International Space Station and NASA’s WB-57 high-altitude research aircraft were brought in to provide rare and unique perspectives of the solar event. To make this possible, NASA deployed and enabled 67 cameras, 6 NASA Wide Area Network control rooms, 38 encoders, and 35 decoders. The team coordinated 20 live telescope feeds which represented 12 locations across the path of totality.

NASA’s eclipse broadcast won another Emmy award earlier this year at the 46th Annual News & Documentary Emmy Awards for Outstanding Live News Special. Additionally, the show received an Emmy nomination for Outstanding Show Open or Title Sequence – News. NASA’s eclipse communication and broadcast efforts also won two Webby Awards and two Webby People’s Voice Awards.

For more information about NASA, visit:

https://www.nasa.gov

Abbey Interrante / Karen Fox
Headquarters, Washington
301-201-0124 / 202-358-1600
abbey.a.interrante@nasa.gov / karen.c.fox@nasa.gov

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This NASA/ESA Hubble Space Telescope image features a stormy and highly active spiral galaxy named NGC 1792. Located over 50 million light-years from Earth in the constellation Columba (the Dove), the bright glow of the galaxy’s center is offset by the flocculent and sparkling spiral arms swirling around it.

NGC 1792 is just as fascinating to astronomers as its chaotic look might imply. Classified as a starburst galaxy, it is a powerhouse of star formation, with spiral arms rich in star-forming regions. In fact, it is surprisingly luminous for its mass. The galaxy is close to a larger neighbor, NGC 1808, and astronomers think the strong gravitational interaction between the two stirred up the reserves of gas in this galaxy. The result is a torrent of star formation, concentrated on the side closest to its neighbor, where gravity has a stronger effect. NGC 1792 is a perfect target for astronomers seeking to understand the complex interactions between gas, star clusters, and supernovae in galaxies.

Hubble studied this galaxy before. This new image includes additional data collected throughout 2025, providing a deeper view of the tumultuous activity taking place in the galaxy. Blossoming red lights in the galaxy’s arms mark Hydrogen-alpha (H-alpha) emission from dense clouds of hydrogen molecules. The newly forming stars within these clouds shine powerfully with ultraviolet radiation. This intense radiation ionizes the hydrogen gas, stripping away electrons which causes the gas to emit H-alpha light. H-alpha is a very particular red wavelength of light and a tell-tale sign of new stars.

Media Contact:

Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD

For the first time, scientists have made a clear X-ray detection of chlorine and potassium in the wreckage of a star using data from the Japan-led XRISM (X-ray Imaging and Spectroscopy Mission) spacecraft.

The Resolve instrument aboard XRISM, pronounced “crism,” discovered these elements in a supernova remnant called Cassiopeia A or Cas A, for short. The expanding cloud of debris is located about 11,000 light-years away in the northern constellation Cassiopeia.

“This discovery helps illustrate how the deaths of stars and life on Earth are fundamentally linked,” said Toshiki Sato, an astrophysicist at Meiji University in Tokyo. “Stars appear to shimmer quietly in the night sky, but they actively forge materials that form planets and enable life as we know it. Now, thanks to XRISM, we have a better idea of when and how stars might make crucial, yet harder-to-find, elements.”

A paper about the result published Dec. 4 in Nature Astronomy. Sato led the study with Kai Matsunaga and Hiroyuki Uchida, both at Kyoto University in Japan. JAXA (Japan Aerospace Exploration Agency) leads XRISM in collaboration with NASA, along with contributions from ESA (European Space Agency). NASA and JAXA also codeveloped the Resolve instrument.

Stars produce almost all the elements in the universe heavier than hydrogen and helium through nuclear reactions. Heat and pressure fuse lighter ones, like carbon, into progressively heavier ones, like neon, creating onion-like layers of materials in stellar interiors.

Nuclear reactions also take place during explosive events like supernovae, which occur when stars run out of fuel, collapse, and explode. Elemental abundances and locations in the wreckage can, respectively, tell scientists about the star and its explosion, even after hundreds or thousands of years.

Some elements — like oxygen, carbon, and neon — are more common than others and are easier to detect and trace back to a particular part of the star’s life.

Other elements — like chlorine and potassium — are more elusive. Since scientists have less data about them, it’s more difficult to model where in the star they formed. These rarer elements still play important roles in life on Earth. Potassium, for example, helps the cells and muscles in our bodies function, so astronomers are interested in tracing its cosmic origins.

The roughly circular Cas A supernova remnant spans about 10 light-years, is over 340 years old, and has a superdense neutron star at its center — the remains of the original star’s core. Scientists using NASA’s Chandra X-ray Observatory had previously identified signatures of iron, silicon, sulfur, and other elements within Cas A.

In the hunt for other elements, the team used the Resolve instrument aboard XRISM to look at the remnant twice in December 2023. The researchers were able to pick out the signatures for chlorine and potassium, determining that the remnant contains ratios much higher than expected. Resolve also detected a possible indication of phosphorous, which was previously discovered in Cas A by infrared missions.

“Resolve’s high resolution and sensitivity make these kinds of measurements possible,” said Brian Williams, the XRISM project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Combining XRISM’s capabilities with those of other missions allows scientists to detect and measure these rare elements that are so critical to the formation of life in the universe.”

The astronomers think stellar activity could have disrupted the layers of nuclear fusion inside the star before it exploded. That kind of upheaval might have led to persistent, large-scale churning of material inside the star that created conditions where chlorine and potassium formed in abundance.

The scientists also mapped the Resolve observations onto an image of Cas A captured by Chandra and showed that the elements were concentrated in the southeast and northern parts of the remnant.

This lopsided distribution may mean that the star itself had underlying asymmetries before it exploded, which Chandra data indicated earlier this year in a study Sato led.

“Being able to make measurements with good statistical precision of these rarer elements really helps us understand the nuclear fusion that goes on in stars before and during supernovae,” said co-author Paul Plucinsky, an astrophysicist at the Center for Astrophysics | Harvard & Smithsonian in Cambridge, Massachusetts. “We suspected a key part might be asymmetry, and now we have more evidence that’s the case. But there’s still a lot we just don’t understand about how stars explode and distribute all these elements across the cosmos.”

By Jeanette Kazmierczak
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Media Contact:
Claire Andreoli
301-286-1940
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Space is packed with all sorts of weird and unexpected stuff, but this humongous, spinning string-thing raises a whole new set of questions.

An elegant new equation identifies the surprisingly orderly, mathematical way in which things break, shatter, and fall apart.

It’s a regrettable reality that there is never enough time to cover all the interesting scientific stories we come across each month. In the past, we’ve featured year-end roundups of cool science stories we (almost) missed. This year, we’re experimenting with a monthly collection. November’s list includes forensic details of the medieval assassination of a Hungarian duke, why woodpeckers grunt when they peck, and more evidence that X’s much-maligned community notes might actually help combat the spread of misinformation after all.

An assassinated medieval Hungarian duke

Credit: Tamás Hajdu et al., 2026

Back in 1915, archaeologists discovered the skeletal remains of a young man in a Dominican monastery on Margaret Island in Budapest, Hungary. The remains were believed to be those of Duke Bela of Masco, grandson of the medieval Hungarian King Bela IV. Per historical records, the young duke was brutally assassinated in 1272 by a rival faction and his mutilated remains were recovered by the duke’s sister and niece and buried in the monastery.

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© Eötvös Loránd University

With just a friend, a phone, and a few Lego bricks, you can accurately measure the size of our planet.

A researcher identified gamma ray emissions that appear to have originated from dark matter, but other physicists still aren’t convinced.

A Vanderbilt physicist has both good and bad news.

Today’s NASA/ESA Hubble Space Telescope image features the spiral galaxy NGC 4535, which is situated about 50 million light-years away in the constellation Virgo (the Maiden). Through a small telescope, this galaxy appears extremely faint, giving it the nickname ‘Lost Galaxy’. With a mirror spanning nearly eight feet (2.4 meters) across and its location above Earth’s light-obscuring atmosphere, Hubble can easily observe dim galaxies like NGC 4535 and pick out features like its massive spiral arms and central bar of stars.

This image features NGC 4535’s young star clusters, which dot the galaxy’s spiral arms. Glowing-pink clouds surround many of these bright-blue star groupings. These clouds, called H II (‘H-two’) regions, are a sign that the galaxy is home to especially young, hot, and massive stars that blaze with high-energy radiation. Such massive stars shake up their surroundings by heating their birth clouds with powerful stellar winds, eventually exploding as supernovae.

The image incorporates data from an observing program designed to catalog roughly 50,000 H II regions in nearby star-forming galaxies like NGC 4535. Hubble released a previous image of NGC 4535 in 2021. Both the 2021 image and this new image incorporate observations from the PHANGS observing program, which seeks to understand the connections between young stars and cold gas. Today’s image adds a new dimension to our understanding of NGC 4535 by capturing the brilliant red glow of the nebulae that encircle massive stars in their first few million years of life.

Media Contact:

Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD

Astronomers have revolutionized our understanding of a collection of stars in the northern sky called the Pleiades. They used data from NASA’s TESS (Transiting Exoplanet Survey Satellite) and other observatories as NASA explores the secrets of the universe for the benefit of all, from the Moon to Mars and beyond.

By examining the rotation, chemistry, and orbit around the Milky Way of members of several different nearby stellar groups, the scientists identified a continuum of more than 3,000 stars arcing across 1,900 light-years. This Greater Pleiades Complex triples the number of stars associated with the Pleiades and opens new approaches for discovering similar dispersed star clusters in the future.

“The Pleiades are very well studied — we often use them as a benchmark in astronomical observations,” said Andrew Boyle, a graduate student at the University of North Carolina at Chapel Hill. “When I started this research, I didn’t expect the cluster to balloon to the size that it did. It really touches on a human note. In the Northern Hemisphere, we’ve been looking up at the Pleiades and telling stories about them for thousands of years, but there’s so much more to them than we knew.”

A paper about the result, led by Boyle, published Wednesday, Nov. 12, in the Astrophysical Journal.

The Pleiades is a bright cluster of stars, also known as Messier 45. This loose grouping of about 1,000 members was born roughly 100 million years ago from the same molecular cloud, a cold dense patch of gas and dust.

About six of the stars in the cluster are visible to the unaided eye during evenings from October to April in the northern constellation Taurus. This collection has also been known since antiquity as the Seven Sisters, although the seventh star is no longer visible.

Boyle and his team initially identified over 10,000 stars that could be related to the Pleiades. These stars were orbiting at a similar rate around our Milky Way galaxy according to data from ESA’s (European Space Agency) Gaia satellite.

They narrowed down that collection using stellar rotation data from TESS.

NASA’s TESS mission scans a wide swath of the sky for about a month at a time, looking for variations in the light from stars to spot orbiting planets. This technique also allows TESS to identify and monitor asteroids out to large distances, determining their spin and refining their shape. Such observations improve our understanding of asteroids in our solar system, which can aid in planetary defense.

Scientists can also use TESS data to determine how fast the stars are rotating by looking at regular fluctuations in their light caused when dark surface features called star spots come in and out of view. Because stellar rotation slows as stars age, the researchers were able to pick out the stars that were about the same age as the Pleiades.

The team also looked at the chemical abundances in potential members using data from ground-based missions like the Sloan Digital Sky Survey, which is led by a consortium of institutions.

“The core of the Pleiades is chemically distinct from the average star in a few elements like magnesium and silicon,” said Luke Bouma, a co-author and fellow at the Carnegie Science Observatories in Pasadena, California. “The other stars that we propose are part of the Greater Pleiades are chemically distinct in the same way. The combination of these three major lines of evidence — Milky Way orbits, ages, and chemistry — tells me that we’re on the right path when making these connections.”

The team members think that all the stars in the Greater Pleiades Complex formed in a tighter collection, like the stars in the young Orion cluster, about 100 million years ago. Over time, the cluster dispersed due to the explosive forces of internal supernovae and from the tidal forces of our galaxy’s gravity.

The result is a stream of stars arcing across the sky from horizon to horizon.

Boyle and Bouma are now working on what they call the TESS All-Sky Rotation Survey. This database will allow researchers to access the rotation information for over 8 million stars to discover even more hidden stellar connections like the Greater Pleiades Complex.

“Thanks to TESS, this team was able to shed new light on a fixture of astronomy,” said Allison Youngblood, the TESS project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “From distant stars and planets to asteroids in our solar system and machine learning models here on Earth, TESS continues to push the boundaries of what we can accomplish with large datasets that capture just a part of the complexity of our universe.”

By Jeanette Kazmierczak
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Media Contact:
Claire Andreoli
301-286-1940
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Stars of all ages are on display in this NASA/ESA Hubble Space Telescope image of the sparkling spiral galaxy called NGC 6000, located 102 million light-years away in the constellation Scorpius.

NGC 6000 has a glowing yellow center and glittering blue outskirts. These colors reflect differences in the average ages, masses, and temperatures of the galaxy’s stars. At the heart of the galaxy, the stars tend to be older and smaller. Less massive stars are cooler than more massive stars, and somewhat counterintuitively, cooler stars are redder, while hotter stars are bluer. Farther out along NGC 6000’s spiral arms, brilliant star clusters host young, massive stars that appear distinctly blue.

Hubble collected the data for this image while surveying the sites of recent supernova explosions in nearby galaxies. NGC 6000 hosted two recent supernovae: SN 2007ch in 2007 and SN 2010as in 2010. Using Hubble’s sensitive detectors, researchers can discern the faint glow of supernovae years after the initial explosion. These observations help constrain the masses of supernovae progenitor stars and can indicate if they had any stellar companions.

By zooming in to the right side of the galaxy’s disk in this image, you can see a set of four thin yellow and blue lines. These lines are an asteroid in our solar system that was drifting across Hubble’s field of view as it gazed at NGC 6000. The four lines are due to four different exposures recorded one after another with slight pauses in between. Image processors combined these four exposures to create the final image. The lines appear dashed with alternating colors because each exposure used a filter to collect very specific wavelengths of light, in this case around red and blue. Having these separate exposures of particular wavelengths is important to study and compare stars by their colors — but it also makes asteroid interlopers very obvious!

Media Contact:

Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD

A pair of NASA spacecraft ultimately destined for Mars will study how its magnetic environment is impacted by the Sun. The mission also will help the agency prepare for future human exploration of Mars.

NASA’s ESCAPADE (Escape and Plasma Acceleration and Dynamics Explorers) spacecraft launched at 3:55 p.m. EST, Thursday, aboard a Blue Origin New Glenn rocket from Launch Complex 36 at Cape Canaveral Space Force Station in Florida.

“Congratulations to Blue Origin, Rocket Lab, UC Berkeley, and all our partners on the successful launch of ESCAPADE. This heliophysics mission will help reveal how Mars became a desert planet, and how solar eruptions affect the Martian surface,” said acting NASA Administrator Sean Duffy. “Every launch of New Glenn provides data that will be essential when we launch MK-1 through Artemis. All this information will be critical to protect future NASA explorers and invaluable as we evaluate how to deliver on President Trump’s vision of planting the Stars and Stripes on Mars.”

The twin spacecraft, built by Rocket Lab, will investigate how a never-ending, million-mile-per-hour stream of particles from the Sun, known as the solar wind, has gradually stripped away much of the Martian atmosphere, causing the planet to cool and its surface water to evaporate. The mission is led by the University of California, Berkeley.

Ground controllers for the ESCAPADE mission established communications with both spacecraft by 10:35 p.m. EST.

“The ESCAPADE mission is part of our strategy to understand Mars’ past and present so we can send the first astronauts there safely,” said Nicky Fox, associate administrator, Science Mission Directorate at NASA Headquarters in Washington. “Understanding Martian space weather is a top priority for future missions because it helps us protect systems, robots, and most importantly, humans, in extreme environments.”

New Glenn also carried a space communications technology demonstration from Viasat Inc., supporting NASA’s efforts to commercialize next-generation satellite relay services for science missions. Funded by the agency’s Communications Services Project, the demonstration transmitted launch telemetry data from the rocket’s second stage to an operations center on Earth through Viasat’s geostationary satellite network.

Blazing new trails

Recent solar activity, which triggered widespread auroras on Earth, caused a slight delay in launch to prevent solar storms from negatively impacting post-launch spacecraft commissioning. When ESCAPADE arrives at Mars, it will study present-day effects of the solar wind and solar storms on the Red Planet in real time. This will provide insights about Martian space weather and help NASA better understand the conditions astronauts will face when they reach Mars.

“The ESCAPADE spacecraft are now about to embark on a unique journey to Mars never traversed by any other mission,” said Alan Zide, ESCAPADE program executive at NASA Headquarters.

Rather than heading directly to Mars, the twin spacecraft will first head to a location in space a million miles from Earth called Lagrange point 2. Right now, Earth and Mars are on opposite sides of the Sun, which makes it harder to travel from one planet to the other. In November 2026, when Earth and Mars are closely aligned in their orbits, the ESCAPADE spacecraft will loop back to Earth and use Earth’s gravity to slingshot themselves toward Mars.

In the past, Mars missions have waited to launch during a brief window of time when Earth and Mars are aligned, which happens roughly every two years. However, with the type of trajectory ESCAPADE is using, future missions could launch nearly anytime and wait in space, queueing up for their interplanetary departure, until the two planets are in position.

This original “Earth-proximity” or “loiter” orbit also will make ESCAPADE the first mission to ever pass through a distant region of Earth’s magnetotail, part of our planet’s magnetic field that gets stretched out away from the Sun by the solar wind.

Studying Mars in stereo

After a 10-month cruise, ESCAPADE is expected to arrive at Mars in September 2027, becoming the first coordinated dual-spacecraft mission to enter orbit around another planet.

Over several months, the two spacecraft will arrange themselves in their initial science formation, in which the twin spacecraft will follow each other in the same “string-of-pearls” orbit, passing through the same areas in quick succession to investigate for the first time how space weather conditions vary on short timescales. This science campaign will begin in June 2028.

Six months later, both spacecraft will shift into different orbits, with one traveling farther from Mars and the other staying closer to it. Planned to last for five months, this second formation aims to study the solar wind and Mars’ upper atmosphere simultaneously, allowing scientists to investigate how the planet responds to the solar wind in real time.

In addition, ESCAPADE will provide more information about Mars’ ionosphere — a part of the upper atmosphere that future astronauts will rely on to send radio and navigation signals around the planet.

The ESCAPADE mission is funded by NASA’s Heliophysics Division and is part of NASA’s Small Innovative Missions for Planetary Exploration program. NASA’s Goddard Space Flight Center in Greenbelt, Maryland, Embry-Riddle Aeronautical University, and Advanced Space support the mission. NASA’s Launch Services Program, based at Kennedy Space Center in Florida, secured the launch service with Blue Origin under the Venture-class Acquisition of Dedicated and Rideshare contract.

To learn more about the ESCAPADE mission, visit:

https://science.nasa.gov/mission/escapade/

-end-

Abbey Interrante
Headquarters, Washington
301-201-0124
abbey.a.interrante@nasa.gov

Leejay Lockhart
Kennedy Space Center, Fla.
321-747-8310
leejay.lockhart@nasa.gov

💾

Science fiction has long speculated about the possibility of first contact with an alien species from a distant world and how we might be able to communicate with them. But what if we simply don’t have enough common ground for that to even be possible? An alien species is bound to be biologically very different, and their language will be shaped by their home environment, broader culture, and even how they perceive the universe. They might not even share the same math and physics. These and other fascinating questions are the focus of an entertaining new book, Do Aliens Speak Physics? And Other Questions About Science and the Nature of Reality.

Co-author Daniel Whiteson is a particle physicist at the University of California, Irvine, who has worked on the ATLAS collaboration at CERN’s Large Hadron Collider. He’s also a gifted science communicator who previously co-authored two books with cartoonist Jorge Cham of PhD Comics fame: 2018’s We Have No Idea and 2021’s Frequently Asked Questions About the Universe. (The pair also co-hosted a podcast from 2018 to 2024, Daniel and Jorge Explain the Universe.) This time around, cartoonist Andy Warner provided the illustrations, and Whiteson and Warner charmingly dedicate their book to “all the alien scientists we have yet to meet.”

Whiteson has long been interested in the philosophy of physics. “I’m not the kind of physicist who’s like, ‘whatever, let’s just measure stuff,'” he told Ars. “The thing that always excited me about physics was this implicit promise that we were doing something universal, that we were learning things that were true on other planets. But the more I learned, the more concerned I became that this might have been oversold. None are fundamental, and we don’t understand why anything emerges. Can we separate the human lens from the thing we’re looking at? We don’t know in the end how much that lens is distorting what we see or defining what we’re looking at. So that was the fundamental question I always wanted to explore.”

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© Andy Warner

A NASA-sponsored team at the University of Iowa (UI) is restoring and advancing the nation’s capability to make high-fidelity magnetic field measurements needed to investigate space weather that can impact our communication and power grids on Earth and our assets in space.

Fluxgate magnetometers are widely-used space science and space weather instruments, but they depend on a legacy component—a ferromagnetic core—that was developed and manufactured for the U.S. Navy using technology that has been subsequently lost to the civilian community.

The UI team manufactures new fluxgate cores using a method that does not rely on legacy processes or materials and then integrates these cores into modern spaceflight magnetometers. The ferromagnetic cores are produced starting from base metal powders that are melted into custom alloys, rolled into thin foils, formed into the desired geometry of the fluxgate core, and artificially aged using heat to optimize their magnetic properties. The resulting cores are integrated into a complete fluxgate sensor ready for spaceflight applications.

Designing, prototyping, and manufacturing the cores, sensors, and paired electronics in house allows the team to explore new sensor geometries that are compatible with different missions. Most recently, the UI team developed a new core to be used in the Space Weather Iowa Magnetometer (SWIM). While the SWIM core is based on a core previously developed for the MAGnetometers for Innovation and Capability (MAGIC) Tesseract sensor that recently launched on NASA’s TRACERS (Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites) mission the SWIM core is miniaturized and retains the same level of performance. The first flight opportunity for the SWIM fluxgate is on the University of Oslo’s ICI-5bis sounding rocket mission that is scheduled to launch in winter 2025/2026 from the Andoya Space Sub-Orbital range in Norway.

Fluxgate magnetometers sense the magnetic field by detecting the electromagnetic force (EMF) induced by the changing magnetic flux. Current is driven into the drive winding (the interior winding on the fluxgate core) creating a magnetic field. When the ferromagnetic material in the cores experiences the magnetic field, its relative permeability (the intrinsic magnetic property of the metal within the core) changes. As the relative permeability changes, a voltage is induced in the sense winding (the outer winding on the core). By knowing the amount of current driven into the core and the voltage that was induced in the sense winding, we can understand the magnetic field that the sensor is experiencing. Most in-space magnetometers are not located onboard the main body of the spacecraft; instead, they are placed on booms to ensure that the magnetic fields produced by the electronics and magnetic materials onboard the spacecraft do not interfere with the sensor.

The manufacturing process for these new cores is now well documented and ~90% of the cores produced have a noise floor that is comparable or better than previous legacy cores. Consequently, UI can reliably mass-produce cores for the SWIM payload and potential future follow-on missions. 

The new SWIM magnetometer design reflects three significant changes compared to the previous MAGIC instrument. The sensor has been simplified and shrunk. Its power consumption has been reduced without sacrificing measurement performance. Both these changes aid its accommodation on a magnetometer boom. In addition, the topology of the paired electronics in each magnetometer channel has been redesigned, which allows use of lower-performance parts that tolerate a higher radiation exposure.

Reduced Sensor size: The compact SWIM design reduces the sensor size by ~30% compared to the MAGIC sensor, with further reduction to the sensor mass likely as the mechanical design is optimized. The MAGIC Tesseract design used six cores whereas the SWIM sensor utilizes three smaller cores of the same geometry. Mass is a major performance driver for deployable boom design and vehicle dynamics. The SWIM sensor can also be manufactured with a lightweight carbon-composite cover (or the cover can be omitted) to achieve a sensor mass of ~110 g, which would enable the sensor to be easily accommodated on small satellite booms.

Reduced Power consumption: Using three smaller cores with improved metallurgy instead of six large racetrack cores reduced the power consumption of the SWIM sensor by a factor of two compared to the MAGIC sensor. Although this power reduction is modest compared to the total consumption of the instrument, it positively impacts the capability for boom deployment. Significant reduction in heat dissipation at the sensor minimizes the spot-heating of the deployable boom and reduces thermal gradients that can drive boom deformation/rotation, which impacts the pointing knowledge at the sensor. These improvements to the sensor have been achieved without impacting the measurement fidelity. In fact, prototype miniaturized SWIM race-track cores are outperforming the previous MAGIC cores due to their improved metallurgy.

Updated Electronics Topology: The MAGIC electronics use a traditional analog demodulator fluxgate and magnetic feedback design. This design requires high-performance components to be able to resolve small variations in large ambient magnetic fields. There are radiation limitations to these high-performance components making it difficult for the MAGIC design to operate in a high-radiation environment. To mitigate these issues, the SWIM design employs digital demodulation instead of analog demodulation and provides magnetic feedback via temperature-compensated, digital, pulse-width-modulation. This update to the electronics enables SWIM to potentially be used in long-duration and/or high-reliability operational applications such as radiation belt missions or planetary missions with long cruise phases.

The SWIM fluxgate design allows for more future applications in a variety of environments without sacrificing the performance seen on the MAGIC sensors. The UI team is looking forward to multiple upcoming flight opportunities for SWIM, including on the Observing Cusp High-altitude Reconnection and Electrodynamics (OCHRE) and ICI5bis sounding rockets.

Project Lead(s): Dr. David Miles, University of Iowa

Sponsoring Organization(s): Heliophysics Strategic Technology Office (HESTO)

NASA’s James Webb Space Telescope has provided the first direct measurements of the chemical and physical properties of a potential moon-forming disk encircling a large exoplanet. The carbon-rich disk surrounding the world called CT Cha b, which is located 625 light-years away from Earth, is a possible construction yard for moons, although no moons are detected in the Webb data.

The results published today in The Astrophysical Journal Letters.

The young star the planet orbits is only 2 million years old and still accreting circumstellar material. However, the circumplanetary disk discovered by Webb is not part of the larger accretion disk around the central star. The two objects are 46 billion miles apart. 

Observing planet and moon formation is fundamental to understanding the evolution of planetary systems across our galaxy. Moons likely outnumber planets, and some might be habitats for life as we know it. But we are only now entering an era where we can witness their formation.

This discovery fosters a better understanding of planet and moon formation, say researchers. Webb’s data is invaluable for making comparisons to our solar system’s birth over 4 billion years ago.

“We can see evidence of the disk around the companion, and we can study the chemistry for the first time. We’re not just witnessing moon formation — we’re also witnessing this planet’s formation,” said co-lead author Sierra Grant of the Carnegie Institution for Science in Washington. 

“We are seeing what material is accreting to build the planet and moons,” added main lead author Gabriele Cugno of the University of Zürich and member of the National Center of Competence in Research PlanetS.

Image A: Circumplanetary Disk (Artist’s Concept)

Dissecting starlight

Infrared observations of CT Cha b were made with Webb’s MIRI (Mid-Infrared Instrument) using its medium resolution spectrograph. An initial look into Webb’s archival data revealed signs of molecules within the circumplanetary disk, which motivated a deeper dive into the data. Because the planet’s faint signal is buried in the glare of the host star, the researchers had to disentangle the light of the star from the planet using high-contrast methods. 

“We saw molecules at the location of the planet, and so we knew that there was stuff in there worth digging for and spending a year trying to tease out of the data. It really took a lot of perseverance,” said Grant.

Ultimately, the team discovered seven carbon-bearing molecules within the planet’s disk, including acetylene (C₂H₂) and benzene (C₆H₆). This carbon-rich chemistry is in stark contrast to the chemistry seen in the disk around the host star, where the researchers found water but no carbon. The difference between the two disks offers evidence for their rapid chemical evolution over only 2 million years.

Genesis of moons

A circumplanetary disk has long been hypothesized as the birthplace of Jupiter’s four major moons. These Galilean satellites must have condensed out of such a flattened disk billions of years ago, as evident in their co-planar orbits about Jupiter. The two outermost Galilean moons, Ganymede and Callisto, are 50% water ice. But they presumably have rocky cores, perhaps either of carbon or silicon.

“We want to learn more about how our solar system formed moons. This means that we need to look at other systems that are still under construction. We’re trying to understand how it all works,” said Cugno. “How do these moons come to be? What are their ingredients? What physical processes are at play, and over what timescales? Webb allows us to witness the drama of moon formation and investigate these questions observationally for the first time.”

In the coming year, the team will use Webb to perform a comprehensive survey of similar objects, to better understand the diversity of physical and chemical properties in the disks around young planets.

The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).

To learn more about Webb, visit:

https://science.nasa.gov/webb

Related Information

Read more: NASA’s Webb Finds Planet-Forming Disks Lived Longer in Early Universe

Explore more: ViewSpace Detecting Other Worlds: Direct Imaging

Explore more: How to Study Exoplanets: Webb and Challenges

Read more: Webb’s Star Formation Discoveries

More Webb News

More Webb Images

Webb Science Themes

Webb Mission Page

Related For Kids

What is the Webb Telescope?

SpacePlace for Kids

NASA’s James Webb Space Telescope has provided the first direct measurements of the chemical and physical properties of a potential moon-forming disk encircling a large exoplanet. The carbon-rich disk surrounding the world called CT Cha b, which is located 625 light-years away from Earth, is a possible construction yard for moons, although no moons are detected in the Webb data.

The results published today in The Astrophysical Journal Letters.

The young star the planet orbits is only 2 million years old and still accreting circumstellar material. However, the circumplanetary disk discovered by Webb is not part of the larger accretion disk around the central star. The two objects are 46 billion miles apart.

Observing planet and moon formation is fundamental to understanding the evolution of planetary systems across our galaxy. Moons likely outnumber planets, and some might be habitats for life as we know it. But we are only now entering an era where we can witness their formation.

This discovery fosters a better understanding of planet and moon formation, say researchers. Webb’s data is invaluable for making comparisons to our solar system’s birth over 4 billion years ago.

“We can see evidence of the disk around the companion, and we can study the chemistry for the first time. We’re not just witnessing moon formation — we’re also witnessing this planet’s formation,” said co-lead author Sierra Grant of the Carnegie Institution for Science in Washington.

“We are seeing what material is accreting to build the planet and moons,” added main lead author Gabriele Cugno of the University of Zürich and member of the National Center of Competence in Research PlanetS.

Image A: Circumplanetary Disk (Artist’s Concept)

Dissecting starlight

Infrared observations of CT Cha b were made with Webb’s MIRI (Mid-Infrared Instrument) using its medium resolution spectrograph. An initial look into Webb’s archival data revealed signs of molecules within the circumplanetary disk, which motivated a deeper dive into the data. Because the planet’s faint signal is buried in the glare of the host star, the researchers had to disentangle the light of the star from the planet using high-contrast methods.

“We saw molecules at the location of the planet, and so we knew that there was stuff in there worth digging for and spending a year trying to tease out of the data. It really took a lot of perseverance,” said Grant.

Ultimately, the team discovered seven carbon-bearing molecules within the planet’s disk, including acetylene (C₂H₂) and benzene (C₆H₆). This carbon-rich chemistry is in stark contrast to the chemistry seen in the disk around the host star, where the researchers found water but no carbon. The difference between the two disks offers evidence for their rapid chemical evolution over only than 2 million years.

Genesis of moons

A circumplanetary disk has long been hypothesized as the birthplace of Jupiter’s four major moons. These Galilean satellites must have condensed out of such a flattened disk billions of years ago, as evident in their co-planar orbits about Jupiter. The two outermost Galilean moons, Ganymede and Callisto, are 50% water ice. But they presumably have rocky cores, perhaps either of carbon or silicon.

“We want to learn more about how our solar system formed moons. This means that we need to look at other systems that are still under construction. We’re trying to understand how it all works,” said Cugno. “How do these moons come to be? What are their ingredients? What physical processes are at play, and over what timescales? Webb allows us to witness the drama of moon formation and investigate these questions observationally for the first time.”

In the coming year, the team will use Webb to perform a comprehensive survey of similar objects, to better understand the diversity of physical and chemical properties in the disks around young planets.

The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).

To learn more about Webb, visit:

https://science.nasa.gov/webb

Related Information

Read more: NASA’s Webb Finds Planet-Forming Disks Lived Longer in Early Universe

Explore more: ViewSpace Detecting Other Worlds: Direct Imaging

Explore more: How to Study Exoplanets: Webb and Challenges

Read more: Webb’s Star Formation Discoveries

More Webb News

More Webb Images

Webb Science Themes

Webb Mission Page

Related For Kids

What is the Webb Telescope?

SpacePlace for Kids

The NASA Community College Network (NCCN) and the American Astronomical Society (AAS) have teamed up to provide an exciting and impactful program that brings top astronomy researchers into the classrooms of community colleges around the United States.

The Harlow Shapley Visiting Lectureship Program, named for astronomer Harlow Shapley (1885-1972), has a history dating back to the 1950s, when it provided support for a scientist to give a series of astronomy-themed lectures at a college or university, coupled with a public talk to the local community. In 2024, AAS partnered with NCCN to broaden the impact of the Shapley lectureship program to community colleges, making use of NCCN’s existing network of 260 college instructors across 44 states and 120 participating Subject Matter Experts (SME) to “matchmake” community colleges with astronomers.

NCCN has supported the teaching of astronomy at community college since 2020. Community colleges serve a vital role in STEM education, with one-third of their students being first-generation college attendees and 64% being part-time students working jobs and raising families. Factor in that up to 40% of students taking introductory astronomy courses nationally each year do so at a community college, and the motivation behind NCCN and the initiatives of the AAS become clear.

In 2024, the pilot collaboration between NCCN and the AAS matched two community colleges — Chattanooga State Community College in Tennessee and Modesto Junior College in California — with SMEs from University of Virginia and Stanford University. In 2025, nine NCCN subject matter experts are engaging with 14 community colleges in six states. They are:

Joe Masiero (Caltech) at Grossmont Community College CA
Vivian U (Caltech) at Scottsdale & Chandler Gilbert Community Colleges AZ
Dave Leisawitz (NASA) & Michael Foley (Harvard) at Elgin Community College IL
Michael Rutkowski (MN State) at Dallas Area Colleges (five colleges) TX
Joe Masiero (Caltech) at Mt. San Jacinto College, Menifee Campus CA
Quyen Hart (STScI) at Casper College WY
Nathan McGregor (UCSC) at Yakima Valley College WA
Patrick Miller (Hardin-Simmons) at Evergreen Valley College CA
Kim Arcand (Harvard-Smithsonian) at Anne Arundel Community College MD
Natasha Batalha (NASA) at Modesto Junior College CA

Each visit of an AAS Shapley Lecturer is unique. The center of each event is the public Shapley Lecture, which is broadly advertised to the local community. Beyond the Shapley Lecture itself, host institutions organize a variety of local engagement activities – ranging from star parties and classroom visits to meeting with college deans and faculty – to make the most of their time with the Shapley Lecturer.

Astronomy instructor James Espinosa from Weatherford College said, “[The visiting Shapley Lecturer’s] visit made a permanent change in how my classes will be taught, in the sense that ‘honors’ projects will be available for ambitious students. I intend to keep in touch with him for several years to come, which is a big impact for our present and future students.”

Dr. Tom Rice, AAS Education Program Manager and AAS lead on the partnership with NCCN, stated, “The AAS’s Harlow Shapley Visiting Lectureship Program represents one of the most impactful ways that astronomers can share our scientific understanding with the widest possible audience, and I am very proud that we have partnered with the SETI Institute and NASA to bring astronomers to their network of community colleges.”

NCCN is supported by NASA under cooperative agreement award number 80NSSC21M0009 and is part of NASA’s Science Activation Portfolio. Learn more about how Science Activation connects NASA science experts, real content, and experiences with community leaders to do science in ways that activate minds and promote deeper understanding of our world and beyond: https://science.nasa.gov/learn/about-science-activation/.

This NASA/ESA Hubble Space Telescope image features a galaxy that’s hard to categorize. The galaxy in question is NGC 2775, which lies 67 million light-years away in the constellation Cancer (the Crab). NGC 2775 sports a smooth, featureless center that is devoid of gas, resembling an elliptical galaxy. It also has a dusty ring with patchy star clusters, like a spiral galaxy. Which is it: spiral or elliptical — or neither?

Because we can only view NGC 2775 from one angle, it’s difficult to say for sure. Some researchers classify NGC 2775 as a spiral galaxy because of its feathery ring of stars and dust, while others classify it as a lenticular galaxy. Lenticular galaxies have features common to both spiral and elliptical galaxies.

Astronomers aren’t certain of exactly how lenticular galaxies come to be, and they might form in a variety of ways. Lenticular galaxies might be spiral galaxies that merged with other galaxies, or that have mostly run out of star-forming gas and lost their prominent spiral arms. They also might have started out more like elliptical galaxies, then collected gas into a disk around them.

Some evidence suggests that NGC 2775 merged with other galaxies in the past. Invisible in this Hubble image, NGC 2775 has a tail of hydrogen gas that stretches almost 100,000 light-years around the galaxy. This faint tail could be the remnant of one or more galaxies that wandered too close to NGC 2775 before being stretched apart and absorbed. If NGC 2775 merged with other galaxies in the past, it could explain the galaxy’s strange appearance today.

Most astronomers classify NGC 2775 as a flocculent spiral galaxy. Flocculent spirals have poorly defined, discontinuous arms that are often described as “feathery” or as “tufts” of stars that loosely form spiral arms.

Hubble previously released an image of NGC 2775 in 2020. This new version adds observations of a specific wavelength of red light emitted by clouds of hydrogen gas surrounding massive young stars, visible as bright, pinkish clumps in the image. This additional wavelength of light helps astronomers better define where new stars are forming in the galaxy.

Media Contact:

Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD