A black hole that hasn't been heard of since 1989 has suddenly become active again and is now the brightest object in the X-ray sky.
Dwarf planet Ceres gets weirder as NASA's Dawn spacecraft gets closer. Check out the latest shots from the cosmic paparazzi.
After a brief course correction, New Horizons is on track to get up close with Pluto on July 14. Here are two awesome ways to catch Pluto fever.
An unmanned rocket carrying 4,000 pounds of cargo to resupply the International Space Station suffered launch failure.
The man responsible for Voyager's "golden record" wants to beam crowdsourced data to the New Horizons spacecraft and take it beyond our solar system.
Former NASA administrator Sean O'Keefe thanks Tom Cruise for his "blinding flash of the obvious."
An upcoming book collates hundreds of rare and unpublished photos of NASA's first manned space programs. Here are images from the first mission to include a spacewalk, which will mark its 50th anniversary next month.
The space agency is studying the use of a soft, tentacled robot to explore watery moons like Jupiter's Europa.
With 10 propellers and a 10-foot wingspan, NASA's unmanned aerial vehicle can take off like a helicopter, then fly like a plane.
NASA developed the MRV (Modular Robotic Vehicle), a go-kart-esque vehicle that's massively entertaining to watch in motion. With four independently functioning wheels, a zero-degree turn radius and some serious drifting capabilities, we're dying to take it for a (literal) spin.