An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner consistent with a large, distant planet.

Astronomer Eliza Kempton said that she had waited her "entire career" to peer into an atmosphere from this mysterious class of planets.

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Discovered in 1930, Pluto was long considered our Solar System's ninth planet, but was unseated in 2006 after the discovery ...

Second-Largest Asteroid in the Solar System May Be an Ancient Piece From a Lost Planet, Claim Scientists Space exploration ...

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, ...

Thanks to JWST, we've learned key details about methanol — a key building block for organic compounds necessary for life — on ...

NASA scientists have sought to understand planet Jupiter, the gas giant whose mass is more than the rest of the planets in ...

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

Discover interesting facts about Saturn, its rings and whether it could contain extraterrestrial life.