Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

The object’s aphelion the farthest point on the orbit from the Sun is more than 1,600 times that of the Earth’s orbit,” said ...

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new ...

There could be a ninth planet in our Solar System after all — and no, it’s not Pluto. Instead, it’s the theoretical ... Though the majority of planetary systems scatter their planets without trapping ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

But other than the now-demoted Pluto, no full-fledged planets beyond ... It's really difficult to explain the solar system without Planet Nine. If it exists, Planet Nine is likely around 500 ...

So, even without messing up things by adding ... largest comet of all time to stick Pluto in the inner solar system. Leah Crane: Let’s do it. Chelsea Whyte: Yes. Leah Crane: I think we should ...