Hidden galaxies emerge from Milky Way's dust

Asteroid to zip by Earth in March, and it's 50% bigger than the one that exploded over Russia

​Could space junk cause a war?

Gas cloud big enough to make 2 million suns is boomeranging around our galaxy, says NASA

​Is Earth actually two planets?

Why we need a planetary protection officer

10 NASA images of planets like Earth

Why NASA's Day of Remembrance still matters

Loneliest planet in the cosmos found in the universe's largest solar system

16 great gifts made from meteorites

How NASA will keep Earth safe from asteroids

Aliens haven't been discovered because they've all gone extinct, says scientist