Pluto isn’t the only dwarf planet in our solar system's outer reaches. Now is an ideal time to look for the egg-shaped Haumea ...

A new model has been developed to simulate interstellar activity within our solar system and the nearby Alpha Centauri system. Interstellar material has been found within our solar system, but ...

Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Work from the DiSCo program (Discovering the Composition of Trans-Neptunian Objects) has uncovered the existence of three main groups of trans-Neptunian objects (TNOs) in the outer Solar System. ...

"We're trying to encounter an astronomical object that streaks through our solar system just once and we don’t want to miss ...

Floating around at the edge of the Solar System are leftovers from its formation. This is the Kuiper Belt, which is composed of chunks of rock and ice like comets, dwarf planets, and random objects ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

Objects smaller than a few hundred feet ... The number of planetary moons may also increase if we find more planets in the solar system. One such world is the elusive Planet Nine — a ...