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 ...

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

HOUSTON, TX – For nearly 300 days, astronaut Sunita Williams soared above the Earth aboard the International Space Station, gazing down at a planet that looked both familiar and foreign.

Pop star Katy Perry and five other women completed the all-women space mission with Blue Origin on April 14, but some don't ...

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