Four months after NASA astronauts Butch Wilmore and Suni Williams returned from their eight-day turned nine-month mission in ...

Astronaut Scott Kelly posted this photo, taken from the International Space Station during his year-long space mission, to social media on July 19, 2015, with the caption, "Day 114. #Moon #Venus ...

Mr. Kelly is a U.S. senator from Arizona and a former NASA astronaut. There’s no country better at solving hard problems than ...

Mark and Scott Kelly, twin brothers and former NASA astronauts, spoke to "CBS Mornings" about how the agency is set to lose ...

Growing plants in space, once a distant dream, is now vital for long-duration missions. Astronauts have successfully ...

Growing plants in space is no longer a distant dream. Scientists and astronauts have been experimenting with growing plants in orbit. NASA astronaut S ...

Test your knowledge of iconic U.S. astronauts and their historic space missions. This quiz covers pioneering achievements, ...

Scott Kelly, who was the first American astronaut to spend almost a year in Earth orbit on board the International Space Station, stars in "Never Stop Dreaming," a minute-long film made by ...

Investments, book deals and speaking engagements make former astronaut Mark Kelly one of the wealthier members of the US ...

Mark Kelly's four years in the Senate came after a career in the military, at NASA and on front lines of advocacy for gun ...