Elizabeth Howell

As for what caused the failture, NASA engineers aren't sure yet.

For the first time, researchers re-created the high-pressure water ice likely found in the interiors of Uranus and Neptune.

The lost planet was the size of Mercury or perhaps Mars, researchers now say.

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.

The launch is a key stepping-stone in the company's quest to bring colonists to Mars.

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.

At least 500,000 pieces of space debris threaten satellites and astronauts, but a California-based company says it has a new approach for taking out the garbage.

If you want to do some science during the total solar eclipse on Aug. 21 using nothing but your phone, consider contributing to the Eclipse Megamovie project.

John Rummel, a biology professor at East Carolina University, reflects on his experiences as NASA's planetary protection officer, a job that requires a lot of science, but no alien combat.

Instead of just sending humans on a one-shot mission to look for life on the surface, a new paper envisions a future outpost on Titan that could generate power for years.