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

(NEW YORK) -- In a remarkable coincidence, NASA astronaut Don Pettit will mark his 70th birthday with a fiery reentry through Earth's atmosphere on Saturday, capping off his fourth mission to space, ...

Astronaut Don Pettit, who has been at the International Space Station since September, is set to land Saturday in Kazakhstan ...