Cheng discovered the object as part of an ongoing research project to identify TNOs and possible new planets in the outer ...

For the unversed, "Planet Nine" is a hypothetical planet which is reportedly larger than Earth that is thought to orbit ...

Plus, an in-depth look at how the West Texas city of Seminole reacted when a measles outbreak tore through the region.

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

The first observations of Pluto by NASA's James Webb Space Telescope (JWST) reveal dramatic phenomena on its surface, like ...

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

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

What's more, the cycle repeats every 44 minutes, at least during periods of extreme activity. Located 15,000 light-years away in a region of the Milky Way brimming with stars, gas and dust ...