In 2015, two astronomers from Caltech presented evidence that six objects past the orbit of Neptune were bunched ... better than in simulations where planet 9 was not included.

In 2015, a pair of astronomers at Caltech found several objects bunched together beyond Neptune's orbit ... from an unknown ...

Astronomers believe Planet Nine might be 5-7 times Earth’s size. It could orbit the sun 200 times farther than Earth. A single orbit might take 10,000 to 20,000 years. Read Also: 'Inspired by ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

2015 TG387’s orbit is observed to be similar to other ... This can be an indicator of a larger object further out, such as “Planet 9/Planet X” shepherding these bodies, though the discovery ...

Others orbit backwards. And still others orbit perpendicular ... In fact, they even went so far to give it a name, Planet 9. Now, of course, if they were to confirm this discovery, it would ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

This is a distinction created by humans to break up all the ways an object might orbit our planet. How it's defined ... vehicles like the SpaceX Falcon 9 can land after sending a payload off ...