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 ...

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 ...

Astronaut Scott Kelly knows this better than most people. He spent 340 days aboard the International Space Station for NASA's twin study. That's where they compared his physical state in space.

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 ...

World Famous former NASA Astronaut Scott Kelly, is officially dropping his first ever NFT, “Dreams Out of this World,” today on International Day of Human Sp ...

As work on President Donald Trump's Space Force gets underway, a retired American astronaut with more time clocked in space than any other human called the idea totally unnecessary.

Scott Kelly Retires From NASA After 20 Years Astronaut Scott Kelly completed four separate missions in 1999, 2007, 2010 and 2015, accruing 520 intergalactic days.

FROM roiling storms, rare comets and volcanic eruptions, there is lots to see aboard the International Space Station (ISS). Fortunately, astronauts are not only equipped with suites of scientific ...