Beyond the familiar planets lies a fascinating frontier filled with icy worlds, mysterious orbits, and cosmic curiosities.

More How many dwarf planets are there? With eight named large rocks in the Kuiper Belt, you might think that means there are eight dwarf planets. However, not all astronomers agree on the number.

Aliens may have been closer to Earth than first thought. New research from NASA reveals that Ceres, the dwarf planet in the ...

Dwarf Planets NASA's New Horizons spacecraft flew past Pluto in the July 2015, snapping several photos of the dwarf planet and its giant, heart-shaped geographical feature.

A new study suggests that the dwarf planet Ceres once supplied a steady stream of chemical energy and may have been habitable.

NASA’s James Webb Space Telescope finds TRAPPIST-1 d lacks an Earth-like atmosphere, narrowing the search for habitable planets.

Astronomers pointed out that the seven planets orbit TRAPPIST-1, a dwarf star that is much younger than our sun and should burn for an additional 10 trillion years — more than 700 times longer ...

Pluto, the largest of those dwarf planets, has a diameter of about 1,477 miles. Don't miss out on what's happening! Stay in touch with breaking news, as it happens, conveniently in your email inbox.

In 2006, there was a proposal to classify Pluto and Charon as a binary system, before the International Astronomical Union opted to reclassify Pluto as a dwarf planet instead.

In Roman mythology, Pluto is the god and ruler of the dead. For a return mission to the dwarf planet, Howett and her ...