Dwarf planets are worlds that are too small to be considered full-fledged planets, but too large to fall into smaller categories. In recent years, there's been a lot of hubbub about Pluto losing ...

After creating this new definition the IUA also decided that objects that meet the first two requirements but not the third would be known as Dwarf Planets. Currently in our solar system we ...

Within the Kuiper Belt—that ring of ices and volatile material beyond the orbit of Neptune—are all but one of the known dwarf planets in the solar system. Pluto is the largest of that class of ...

A new animation shows the orbits of hundreds of dwarf planets beyond Pluto. The astronomer who compiled the data says it may only capture a small fraction of dwarf planets in the solar system.

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets ...

the remaining gas planets inhabit deeper space. The Solar System is also home to many other cosmic bodies including asteroids, moons and dwarf planets such as Pluto. What's this? Oh noooo ...

Here are seven weird facts about Ceres. [Dawn's Arrival at Dwarf Planet Ceres: Full Coverage] Ceres was first spotted on Jan. 1, 1801 by Sicilian astronomer Giuseppe Piazzi. The asteroid was found ...

An artist's rendering of the dwarf planet Eris | ESO/L. Calçada and Nick Risinger (skysurvey.org) // CC BY 4.0 Far beyond the orbit of Pluto exists a celestial body that’s a little smaller ...