The Royal Observatory Greenwich and BBC Sky at Night Magazine announced the winners of this year's astrophotography contest.
Read a Chapter 1 excerpt from the new trade paperback, "The Girls of Atomic City," a novel by Denise Kiernan.
See stunning photos of Phobos and Deimos, the small moons of Mars, as seen by spacecraft on and orbiting the Red Planet. Phobos is the largest moon of Mars, with Deimos as a smaller satellite.
A United Launch Alliance Atlas V rocket carrying a payload for the National Reconnaissance Office lifted off from Space Launch Complex-3. See photos of the launch and launch prep.
Amazon.com founder Jeff Bezos hopes to recover the Apollo 11 rocket engines from the Atlantic Ocean floor.