China starts 200-day simulation of living on another planet
It's an important step toward becoming a space superpower.
NASA selects new class of astronauts for future exploration
The 22nd group includes engineers, military medics, pilots and scientists.
Mars astronauts at greater risk of cancer than previously thought
Cosmic rays are much more of a threat than expected.
Watch NASA's first 4K broadcast from space on April 26th
Live 4K video from Earth's orbit, but we still can't watch Netflix without buffering.
Watch as NASA lays John Glenn to rest on Thursday
The legendary astronaut and US senator will be buried at Arlington.
Watch astronaut Peggy Whitson's historic spacewalk
She's on track to having the most spacewalks under her belt out of all female astronauts.
Astronaut Jessica Meir will answer your questions on Tumblr
She'll begin at 4:30PM (Eastern time) today, March 11th.
Moon mission will test an anti-radiation vest for astronauts
The shield could be vital to future Mars landings.
NASA studies astronaut twins to observe the rigors of space
Preliminary findings indicate changes in gene expression and other biological markers.