The CRASH Clock is a new metric for measuring the risks of satellite congestion in low-Earth orbit. Its calculations are disturbing.

This could be the end of the orbiter that studies the Red Planet’s atmosphere and relays communications between NASA and its Mars rovers.

The close call underscores the need for improved coordination between satellite operators, Starlink’s vice president of engineering said.

After a very cold and snowy start to December, temperatures will shift toward unseasonable warmth just in time for Christmas.

Should the mission proceed as planned, it will mark a major step forward for accessibility in spaceflight—sending the first wheelchair user beyond Earth.

This year, thousands of Tuvaluans applied for Australia’s climate-migration visas to escape the impacts of rising sea levels.

The moisture from this storm system will help two fast-moving winter storms spread snow across the eastern U.S., with another atmospheric river on its way.

A new study predicts that by 2100, the Amazon rainforest could experience up to 150 days of hot drought conditions each year, causing mass tree die-offs.

"Please stay prepared to evacuate immediately if you feel any shaking, while continuing your socioeconomic activities.”

Elon Musk is building Skynet, from the movie Don't Build Skynet.

A USGS webcam captured harrowing footage of Hawaii’s Kīlauea erupting over the weekend. It didn't survive.

Amid media reports of skyrocketing valuation and a potential IPO for SpaceX, the company could have a lot to lose next year.