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 ...

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

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. ...

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 ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Interstellar objects are among the last unexplored classes of solar system objects, holding tantalizing information about primitive materials from exoplanetary star systems. They pass through our ...

Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but unlike any in our ...

With the new spottings, Saturn has usurped Jupiter which has 95 known moons, while Uranus (28) and Neptune (16) remain third and fourth on the list.