It must have cleared all other celestial bodies, except its own moons, from its orbit.

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...

Astronomers have been curious about the makeup of Ceres, the largest object in the asteroid belt, ever since its discovery by ...

Recent data from the James Webb Space Telescope (JWST) suggests that a planet orbiting a small, red star 35 light years away ...

The solar system has nine planets, but in 2006 the International Astronomical Union declared Pluto a dwarf planet, making the ...

A distant white dwarf hosts an Earth-like planet in an orbit that might be similar to Earth’s if it survives the Sun’s red giant phase.

Within GRAVITY’s combined observations, Xuan’s team discovered that Gliese 229 B was not a single object, but a pair of brown ...

By probing chemical processes observed in the Earth's hot mantle, Cornell scientists have started developing a library of ...

If our planet did survive, it would be so close to the expanded ... However, all of this is merely theoretical, because not ...

One nearby M-dwarf, TRAPPIST-1, is about 40 light-years away ... and cooling over hundreds of millions of years into a solid terrestrial planet. Results showed that hydrogen or other light gases did ...

Only one other pair of brown dwarfs are known to ... But they are more massive than the biggest planets. "A brown dwarf is an object that fills the gap between a planet and a star.

Some theories say brown dwarf pairs could form within the swirling ... Whether these same formation mechanisms are at work to form pairs of planets around other stars remains to be seen.