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 ...

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.

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.

Getting ...