On Feb. 23, 1990, NASA's Pioneer 11 spacecraft left the solar system! See how it happened in our On This Day in Space video series!
Aerojet Rocketdyne will develop "enabling technologies" for DARPA's Glide Breaker program under a newly announced contract, which is worth up to $19.6 million.
If a giant object looks like it's going to slam into Earth, humanity has a few options. A new guide could help NASA decide which one is best.
While the cold, dry, radiation-blasted surface of Mars is widely considered to be uninhabitable, the subsurface may be a very different story.
The Breakthrough Listen SETI project has scanned the interstellar Comet Borisov for "technosignatures" but come up empty so far.
A starry night scene captured at the end of summer from the Dark Sky Alqueva reserve in Portugal shows the Milky Way's galactic arc shimmering above a dead tree in Noudar Park.
After he lost his father's lightsaber and before he built his own, Luke Skywalker had a different Jedi weapon.