Yet actually finding Planet Nine, sometimes called Planet X, has eluded scientists for nearly a decade. But the hunt for the solar system's potential ninth planet may soon be coming to a close.

If Planet 9 is real, this observatory has around a 70 to 80 percent chance of finding it, he estimates, adding that it's not a sure thing because there are so many uncertainties.

Astronomers have captured the sharpest, most detailed images yet of young solar systems where planets are just beginning to take shape.

EXCLUSIVE: Warner Bros Pictures Animation is heading to the Discovery vault to adapt its Animal Planet series Meerkat Manor into an animated feature. Think Happy Feet: That George Miller-hatched ...

When most of us left school there were still 9 planets – but we’ve come a long way since Pluto’s demotion. Here’s what’s next on the space agenda.

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to ...

For decades, we believed there were nine planets in our solar system—until Pluto was reclassified in 2006. But what if there’s another planet, five times the size of Earth, lurking in the ...

For years, scientists have puzzled over how these “wide-orbit” planets, including the elusive Planet Nine theorized in our own solar system, could have formed.

For years, scientists have puzzled over how these "wide-orbit" planets, including the elusive Planet Nine theorized in our own solar system, could have formed.

The Apple TV+ animated comedy from Dan Harmon and Nathan W. Pyle is undeniably clever, if surface-level.

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

Apple TV+ announced today that their upcoming ten-episode adult animated series Strange Planet will make its global debut on Wednesday, August 9. Based on the New York Times #1 bestselling graphic ...