The Air Force says that the almost one-of-a-kind spacecraft "conducted on-orbit experiments" in the the longest-ever mission for the X-37B program.
A rare close flyby of a comet near Mars put NASA's orbiters in a potentially dangerous situation, but also allowed them to study the moving space object.
Earth is near the center of a tangled mass of potentially hazardous asteroids. But there's little to worry about.
A new company called Mesoloft will rocket your ashes to near space, where they will likely traverse the globe before becoming the seeds of raindrops and snowflakes.
The closest look ever at a new comet will happen when the mountain-size comet Siding Spring buzzes past Mars this weekend.
Using tech known as lidar, a device will map forests in 3D and increase understanding of their role in the carbon cycle.
A user posts a fake news piece to CNN's iReport news hub. It stays live for 22 hours before someone realizes it must surely not be true.
The world's most powerful rocket, designed to carry humans to Mars, is scheduled for a test launch in 2018.
A fascinating NASA presentation suggests that in July 2012 Earth was one week away from being struck by a massive solar storm that would have had devastating effects. Can this be?
It's official: NASA moved their Space Launch System rocket from analysis to actual development, moving us one step closer to sending humans to Mars.