How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between five and 18, plus hundreds of potentially undiscovered ones, depending on ...

In 2006, and after much debate, the International Astronomical Union came up with a new definition for a planet. And for the first time, the term "dwarf planet" was used. Dwarf Planets ...

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

Still, that comes to 28.7 billion planets in the Goldilocks zones of M-dwarfs alone. This does not even consider other types of stars, like our own yellow Sun.

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.