An international team reported that a new celestial object — perhaps a star, pair of stars or something else entirely — is ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Jupiter-like planet 8 UMi b, named Halla, orbits its host red giant star Baekdu closely. The red giant's merger with a white dwarf star questions how Halla could exist. Credit: Space.com | animation ...

Earth has a new neighbor that lives far, far away. Scientists from the Institute for Advanced Study's School of Natural ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

Asteroids are the ancient remnants of our solar system's birth, rocky fragments that never formed into planets. Most of these ...

It is an evocative idea that has long bedevilled scientists: a huge and mysterious planet is lurking in the darkness at the ...

Scientists using the James Webb Space Telescope recently announced the discovery of gases on a faraway planet that may be the same as those produced by ocean plankton on Earth. But a North Carolina ...

If there is to be a global apocalypse, what might be to blame for wiping out all life on Earth? Scientists believe they may ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...