Elizabeth Howell

A near-Earth asteroid lurked undetected for decades until a telescope in Hawaii spotted it earlier this year. It may be Earth's newest quasi-moon.

Black holes get bigger as they merge, the LIGO Collaboration confirmed with a new observation that could finally prove a decades-old Stephen Hawking theory.

Astronomers using the James Webb Space Telescope have discovered a planet-forming disk that almost entirely lacks water, challenging prevailing theories.

Early Earth may not have had the right ingredients for life — until a nearby Mars-size planet crashed into it, two new studies hint.

The near-Earth asteroid Bennu contains stardust that is older than the solar system and clues about its violent history, three new studies of the asteroid's sample materials show.

With help from AI, astronomers have spotted a never-before-seen kind of supernova that seems to have been blowing up just as it was trying to gobble down a black hole.

We know little about how young galaxies and their black holes grew up.

Alpha Centauri may have a "disappearing planet', new James Webb Space Telescope observations hint. If confirmed, it could be the closest alien planet to Earth that orbits in its star's habitable zone.

The very first stars in the universe may have been much smaller than scientists thought — potentially explaining why we can't find evidence of them today.

Astronomers have used a novel technique to find evidence of a secret "buddy" star orbiting Betelgeuse, one of the brightest objects in the night sky — but this sun-size companion may not survive for long.

Astronomers spotted a baby star displaying the very first signs of planet formation in the zone surrounding it, similar to how our own solar system was born.

Canada will soon roll a rover onto the moon, and you can help name the pioneering machine.

A North Korean ICBM flew 4,350 miles high on Oct. 30, media reports stated. It comes amid growing concern by the U.S. and NATO about North Korean military activities.

Troubleshooting the leaking ISS is ongoing, with NASA and Russia now identifying 50 "areas of concern" and four cracks, according to a media report.

NASA's most distant spacecraft had a critical thruster problem far from home. Fixing it required a long-distance call to overcome extreme cold and dwindling power.

The moon's glow meets a stunning aurora in a new astronaut image taken from space.

Kepler's sun drawings are the oldest sunspot records with known dates.

The cameras aboard the International Space Station may be ready, but it's still not clear where to point them in order to capture the April 8 total solar eclipse.

Last week, the Martian moon Phobos passed neatly between Mars and the sun. NASA's Perseverance rover caught the fortuitous eclipse on camera.

NASA's Curiosity rover spotted a rock formation on Mars that looks just like Star Trek's signature Starfleet symbol.

Engineers intentionally blew up a full-scale prototype of an inflatable space module that could be used in future missions. Watch the big bang unfold here.

Astronaut Frank Rubio is officially off the hook in the case of the disappearing space tomatoes, now that ISS astronauts have finally found the bag of produce that went missing 8 months ago.

NASA astronaut Frank Rubio spent hours looking for a tomato that floated away on the International Space Station. Eight months later, his colleagues finally found it.

Liftoff of SpaceX's enormous Starship is currently scheduled for Nov. 18, during a 20-minute window that opens at 8 a.m. ET.