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 find ...

The search for Planet 9 has intrigued astronomers and enthusiasts alike. In this video, we’ll explore the theories and ...

A small team of planetary scientists from the California Institute of Technology, Université Côte d'Azur and Southwest ...

The solar system has nine planets, but in 2006 the International Astronomical Union declared Pluto a dwarf planet, making the ...

The search for Planet Nine, a hidden world beyond Neptune, is heating up as scientists prepare to use a powerful new telescope.

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What to Watch: In Theaters and On Streaming. Link to What to Watch: In Theaters and On Streaming.

Averting your gaze when viewing the ringed planet can cause an optical phenomenon that might make you think twice about what ...

Planet Fitness Q3 earnings exceed expectations, raises full-year guidance and reports strong club openings and membership ...

Here's what to know about the "Dune" prequel series that's set 10,000 years before the events of the films starring Timothée Chalamet and Zendaya.

The 2005 revelation set off a chain of events that led to Pluto’s still-controversial demotion from planet status the following year. But now, just as the Kuiper Belt effectively took a ninth ...