Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Our solar system ...

Every object in our Solar System is held in place by the Sun ... a field-of-view large enough to capture the entire planet It is about nine times the width of Earth and nine and a half time ...

If the PBH were in our solar system, it could cause the gravitational perturbations that affect the TNOs without radiating visible light and, therefore, be practically undetectable by telescopes.

They called it "Planet Nine". Now, they've published a study, yet to be peer-reviewed, that simulated the movements of ...

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. Data gathered in 1983 shows signs of what a British astronomer believes to be possible ...

Aside from the solar system once again having nine planets—which it had before Pluto’s demotion in 2006—the discovery of a distant Earth-mass planet would have profound implications for ...