Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Pluto is back! His adventures searching for the mysterious dwarf planets continue! Welcome to SolarBalls! Space animation filled with fun, entertaining animations that also help you learn about ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

Makemake is the third-largest known dwarf planet in our solar system, after Pluto and Eris, with a diameter of 888 miles across. It takes about 309 years to orbit the sun.

Among the roughly 10 billion white dwarf stars in the Milky Way galaxy, a greater number than previously expected could provide a stellar environment hospitable to life-supporting exoplanets ...

Quaoar is part of a collection of about 3,000 dwarf planets known as trans-Neptunian objects, which are beyond the orbit of the planet Neptune. Latest U.S.

Dwarf planets are smaller planets that do not meet all three categories of a planet. According to NASA, they are round in shape and orbit the sun, but don’t clear their orbital path.

The dwarf planets in question, Eris and Makemake, are both found in the Kuiper Belt past Neptune's orbit and are far from the Sun's warmth, similar to fellow dwarf planet Pluto.