Scott Kelly, a fellow astronaut, vouched for the Danish astronaut and said he didn’t deserve that kind of disrespect. Musk replied that he did, and trashed Mark Kelly. “Your brother claims to ...

Scott Kelly and Mark Kelly are American astronauts and identical twin brothers. They participated in NASA's Twins Study, ...

Senator Mark Kelly, an Arizona Democrat and former astronaut, visited Ukraine over ... But war was a scenario its engineers never envisioned. Our team of visual journalists analyzes satellite ...

Kelly added more comments on X Monday about the U.S.’ change in policy after saying he made the trip with his twin brother, Scott, who is, like Mark Kelly, also a former astronaut. U.S. Sen.

Scott Kelly, who is also a former astronaut, pushed back. “Hey @ElonMusk, when you finally get the nerve to climb into a rocket ship, come talk to the three of us,” Mark Kelly said.

Scott Kelly, a former astronaut, discussed the return of NASA astronauts from the International Space Station on Fox News. He holds the record for the most cumulative days in space and completed a ...

NASA astronauts like Peggy Whitson, Sunita Williams, and Scott Kelly have set records for the longest space missions on the ...

At the press conference, NASA aimed to focus on the scientific research the astronauts conducted in space. However, when ...

Here's a look at some others who found themselves stuck in space — by choice or not — along with some cool spaceflight ...

U.S. astronauts Suni Williams and Butch Wilmore's next mission will ... spaceflight in 2016. Kelly was studied against his identical twin brother, retired astronaut Sen. Mark Kelly, D-Ariz., ...