What's behind his posts? Is it just another Musk prank, or is he actually serious about the idea?
SpaceX CEO Elon Musk has a vision: He wants to get humans to Mars as soon as possible. Is that humanity's best option?
For the first time, researchers re-created the high-pressure water ice likely found in the interiors of Uranus and Neptune.
Earth received a cosmic close shave on Sunday (April 15) when a football field-size boulder passed by at half the moon's distance from our planet.
Skywatchers tonight (March 31) will be treated to the second and final Blue Moon of 2018, just on the eve of Easter. What is this type of moon, and is it actually blue?
Scientists expect that as the station burns up, it will generate huge fireballs visible from the ground.
The uncontrolled fall to Earth of China's Tiangong-1 space lab may share some similarities with the end of the Skylab space station in 1979; some of Skylab's pieces rained down on rural Australia.
The one-module station is in an uncontrolled fall and will re-enter the atmosphere somewhere underneath the spacecraft's orbit, but nobody knows exactly when or where that will happen.
The crashing space lab's orbital path includes the United States and most of the population of the world. On the off chance a piece of Tiangong-1 hits you, here's who is liable.
"Cosmos" host and astrophysicist Neil deGrasse Tyson recently shot down the ideas of anyone out there who still thinks the Earth is flat.
NASA didn't spot the asteroid, 2018 CB, that will skim by Earth today until a few days ago. Here's why it snuck under the radar.
SpaceX's star dummy, riding in space inside a cushy Tesla Roadster, could lose contact with Earth any time.
Meteorite hunters in Michigan found six rocks Thursday (Jan. 18) that likely came from a spectacular fireball that lit up local skies earlier this week.
The former head of a secret government program to investigate UFO sightings told several media outlets that extraterrestrial life may exist.