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

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 ...

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 ...

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

When searching for life in the Universe (aka. astrobiology), scientists use strategies that go by various names. For example, ...

A planet twice the size of Jupiter has been confirmed in Nu Octantis. Its retrograde orbit and origin raise new questions about planetary formation in binary systems.

Astronomers confirm the existence of small, hot and likely rocky planets by observing the subtle gravitational wobbles of the star they orbit Researchers supported by the U.S. National Science ...

Webb’s powerful instruments have detected crystalline water ice in a distant star system, offering rare insight into planet ...