NASA and Russia launched a joint one year mission to the International Space Station. NASA's Scott Kelly and cosmonaut Mikhail Kornienko lifted off to the orbiting outpost on March 27, 2015, and landed 340 days later after just under a year in microgravity.
Two American astronauts took a marathon spacewalk on Friday, spending nearly eight hours outside the International Space Station on a truly out-of-this-world plumbing job.
Scott Kelly set a new record for American spaceflight, and scientists are searching for signs of an alien civilization around a distant star. Here are Space.com's top stories of the week.
Astronaut Scott Kelly captured this inspiring image of an early morning aurora from the International Space Station.
On the halfway point of his year-long mission in space, NASA astronaut Scott Kelly captured this stunning image of the United States early in the morning.
Could genes determine what makes a good astronaut? How does spaceflight impact the human genome? The one-year mission aboard the International Space Station may start unearthing answers.
Last weekend, astronaut Scott Kelly answered questions on Twitter about life in space, including how astronauts bathe, do laundry and exercise, and how he's liking his one-year stay in orbit.
Halfway through his 342-visit to the ISS, astronaut Scott Kelly talks about what he's looking forward to, and what he misses.
A stunning video shows a breathtaking aurora light display captured from the International Space Station by astronaut Scott Kelly, who said it was like no other aurora he'd ever seen.
In a series of high-profile television interviews, astronaut Scott Kelly told reporters about his daily life in space, and his favorite TV shows to watch in orbit.
Cosmonauts scrubbed a window, documented the International Space Station (ISS) exterior, collected an experiment and battled cold fingers during a speedy spacewalk Monday, August 10.