Called 2017 OF 201, this mysterious trans-Neptunian object (TNO) has an orbit so extreme it takes 25,000 years to complete one trip around ... Read more The post Pluto’s Secret Rival?

2017 OF201 is about one-third the size of Pluto, which was reclassified as a dwarf planet in August 2006, and "is likely large enough to qualify as a dwarf planet, and its orbit is extremely wide ...

This orbit places 2017 OF201 among a class of objects known as extreme trans-Neptunian objects (ETNOs). These are icy bodies so far away and slow-moving that they barely seem tethered to the sun ...

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 whom ...

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

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

A composite image showing the five dwarf planets recognized by the International Astronomical Union, plus the newly discovered trans-Neptunian object 2017 OF201. The TNO is potentially large ...

Astronomers have discovered a new small planet far from Pluto, expanding our understanding of the solar system's far reaches. Nicknamed 2017 OF201, this trans-Neptunian object (TNO) is one of the ...

The team has named the celestial body 2017 OF201. Researchers say a new planet was discovered beyond Neptune. (NASA/JPL-Caltech/Sihao Cheng et al, Jiaxuan Li and Sihao Cheng/CNN/CNN Newsource) ...

Astronomers have discovered a new dwarf planet, named 2017 OF201, far beyond Pluto’s orbit. It takes 25,000 years to orbit the sun—much longer than Pluto’s 248 years. This makes it one of ...

2017 OF201 is about one-third the size of Pluto, which was reclassified as a dwarf planet in August 2006, and "is likely large enough to qualify as a dwarf planet, and its orbit is extremely wide," ...