Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Astronomers have detected a rare black hole outside a galaxy’s core devouring a star in the first known offset tidal ...

A team of international scientists has identified a promising Planet Nine candidate by comparing infrared surveys of the sky taken with a 23-year gap.

but the new definition of a planet requires the celestial body to have enough gravity to clear its orbital path from other bodies. MORE: Binary star system found near the Milky Way's black hole ...

The new research also undercuts some of the more fringe Planet Nine theories—like the idea that it’s a primordial black hole—since the apparent object is emitting light in the infrared.

"I think this discovery will motivate scientists to look for more examples of this type of event." Astronomers have caught a ...

In a segment that saw the crew visit a planet which fell within the gravitational grasp of a huge black hole, the event caused time to slow down massively.

Using NASA 's Hubble Space Telescope and other observatories, astronomers found the cosmic object in an unexpected place.

Getting ...

"All it took was courage, determination, and the total collapse of the planet into a black hole. A brave sacrifice that has not seen any unforeseeable consequences." This sentiment has been echoed ...