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

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system. The object—which orbits out beyond Neptune—has been named "2017 OF201" by the ...

Dwarf planets are worlds too small to be full-fledged planets, but too big to fit in smaller astronomical categories. Pluto, the most famous dwarf planet, lost its planet status in 2006.

A new definition of "planet" may recategorize many dwarf planets and moons as planets. You may be familiar with our solar system's eight planets — Mercury, Venus, Earth, Mars, Jupiter, Saturn ...

Way out beyond Mars, but before you get to Jupiter, is a planet. Well, it was a planet, then later an asteroid. Now it’s called a dwarf planet.

While almost everyone knows about Pluto being a dwarf planet, many are not aware that there are five others in our solar system. Makemake, Hauema, Cerces, and Eris.

Pluto's status has been a heated debate for decades with arguing over a dwarf planet classification. Here's what international standards say in 2023.