Planet Nine, if it exists, would have to be a little over six times Earth’s mass, with an orbital period of about 7,400 years. The newly cataloged minor planet is big, but not Planet Nine big.

Astronomers are getting closer to discovering the elusive and mysterious Planet Nine after 139 "minor planets" were discovered past Neptune's orbit. These objects, ones "that were not previously ...

Astronomers discovered the minor planet 2007 OR10 more than a decade ago. Now they’re asking the public to vote on what to submit as its official name.

There's a Minor Planet in Our Solar System That Needs a New Name—and Scientists Are Asking for Your Help. Published Apr 10, 2019 at 6:30 AM EDT Updated Apr 10, 2019 at 9:04 AM EDT.

On Wednesday, the red minor planet's discoverers announced a campaign that will let the public decide 2007 OR10's new name. Until May 10, you can cast your vote for one of three options: "Gonggong ...

A minor planet discovered in our solar system over a decade ago remains nameless, and the astronomers who made the heavenly find are now turning to the public for help. Meg Schwamb, Mike Brown and ...

Astronomers have discovered 139 new “minor planets” in our solar system, beyond the orbit of Neptune. These small objects could provide clues as to whether the mysterious Planet Nine, a ...

The International Astronomical Union has named 17 minor planets as part of its NameExoWorlds contest. Looking at the winning monikers—which include such ...

Reported in The Astrophysical Journal Supplement Series, researchers using data from the Dark Energy Survey (DES) have identified more than 300 so-called trans-Neptunian objects (TNOs)—minor ...