Don Pettit, the oldest serving astronaut at NASA, splashed down to Earth on Sunday, April 20, after spending over 220 days on ...

Don Pettit, NASA's oldest active astronaut, marked his 70th birthday by landing on the steppe of Kazakhstan after 220 days in space.

Learn more about who Suni Williams is and what her contributions have looked like throughout her career in space.

Astronaut Don Pettit shared what he calls “science of opportunity” to demonstrate how experimenting with our surroundings can ...

NASA astronaut Suni Williams works outside the International Space Station. Credit: NASA | edited by Space.com's Steve ...