How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

When most people think of our Solar System, they think of the 8 planets officially recognized by the International Astronomical Union (IAU). But what if I told you there are at least 40 planets, and ...

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 ...

The category "dwarf planet" was created in 2006 to make room for the many large bodies being discovered on the outer reaches of the solar system. Here's a tour of the five currently recognized ...

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.

Earth has a newly-discovered neighbor in the solar system.. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

A newly found object may set a new record for the most distant dwarf planet in the solar system.. The object, called V774104, lies about nine and a half billion miles from the sun, or two to three ...

Just on the outskirts of our solar system exists the dwarf planet Quaoar, and recent observations of the planet found a dense ring around it, but scientists can't figure how – or why – it's ...

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 ...

The category "dwarf planet" was created in 2006 to make room for the many large bodies being discovered on the outer reaches of the solar system. Here's a tour of the five currently recognized ...