The discovery of 2017 OF201 is significant, as it challenges the hypothesis of Planet Nine, a hypothetical planet thought to ...

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

They found that volcanic gases lacked significant steam, indicating the planet's interior ... 1453 c is twice Earth’s size and may have a... Astronomers have revealed new evidence that there ...

The planet is "crumbling to pieces," shedding the equivalent of Mount Everest’s mass every 30.5-hour orbit and will be ...

The discovery of this new, farther-out super Earth is even more significant ... than Earth all the way to the size of Jupiter and beyond shows us that planets, and especially super-Earths, in ...