Browsing Tag

Solar system

Where Is ‘Planet Nine’ Already?

In 2016, when astronomers made the case for a ninth planet, orbiting far beyond Neptune, that could explain a strange clustering of objects in the outer reaches of our solar system, they were hopeful it would be found in less than five…

Planet Nine, Show Thyself

Astronomers have found tantalizing new evidence that strengthens the case for a ninth planet beyond Neptune—but some still doubt its existence. In 2016, when astronomers made the case for a ninth planet, orbiting far beyond Neptune, that…