Sen. Mark Kelly of Arizona said he could no longer stand the association with Elon Musk.

WASHINGTON − Elon Musk and Sen. Mark Kelly, D-Ariz., traded jabs on social media Monday, after the billionaire space ...

What happened to NASA astronaut Scott Kelly after spending a year in space while twin brother Mark, also an astronaut, remained at home?

NASA astronauts Suni Williams and Butch Wilmore were selected for the first crewed test flight on Boeing's Starliner and were ...

Senator Mark Kelly, an Arizona Democrat and former astronaut, visited Ukraine over the weekend and said the United States ...

Elon Musk called Democratic Sen. Mark Kelly a "traitor" in a post on X after Kelly posted that he had visited Ukraine over ...

The European Space Agency (ESA) says that just one week in space is equivalent to one year's worth of radiation exposure on Earth. This radiation can put astronauts at risk of radiation sickness, ...

Kelly once got along with Musk. The former NASA astronaut has repeatedly praised the private space sector, which Musk's SpaceX remains a dominant force in. The pair's relationship has soured in ...

Senator Mark Kelly joins Andrew Egger to discuss his recent trip to Ukraine, the importance of defending freedom, his ...

US astronauts Barry "Butch" Wilmore and Sunita "Suni" Williams are Earthbound Tuesday after more than nine months in space. But now, they have a new mission: recovery. Why it matters: Muscle atrophy, ...

Elon Musk on Monday accused Sen. Mark Kelly of being a “traitor” after he visited Ukraine and said the U.S. should keep ...

For comparison, after NASA astronaut Scott Kelly spent one year in space, he had to learn how to walk again, Beheshti said. “Being a year in space like that, it definitely takes a while for them ...