Astronomers have discovered a new exoplanet that may be habitable 35 light-years from Earth. Named L 98-59 f, it joins four ...

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 ...

But things changed nearly five years ago today. On Aug. 24, 2006, the International Astronomical Union (IAU) struck Pluto from the list, demoting it to the newly created category of " dwarf planet ." ...

This means that Pluto is not a planet, but a dwarf planet. In our solar system, there are five dwarf planets: Ceres, Haumea, Makemake, Eris and of course, Pluto.

Pluto, the largest of those dwarf planets, has a diameter of about 1,477 miles (2,377 km). The mass of 2017 OF201 is estimated to be about 20,000 times smaller than Earth’s and 50 times smaller ...

The dwarf planet Eris is one of the most reflective objects in our solar system, astronomers say in a study uncovering a trove of information about the mysterious object beyond Pluto.

5 jaw-dropping NASA pics of dwarf planets in our solar systemMakemake is a dwarf planet in the Kuiper Belt. Its icy surface reflects much of the sunlight, making it one of the brightest objects in ...

The latest Dwarf Planets breaking news, comment, reviews and features from the experts at Dwarf Planets Coverage ...

The dwarf planet, named 2015 RR245 for now, has an unusual orbit — it's very large and looping, and takes 700 years to travel around the sun. The researchers estimate that little 2015 RR245 is ...

On average, the dwarf planet cruises around the sun at a distance of 3.65 billion miles (5.87 billion km), taking 248 years to complete one circuit. [Infographic: Pluto - A Dwarf Planet Oddity] ...