Marco Rubio has made a poor decision by firing more than 100 National Security Council staffers late on the Friday before ...

Posted to the r/funny subreddit, u/ChuckySix uploaded a photo titled, "My son has his future mapped out," with a ...

I can thank my proactive Girl Scout leaders back in 1980-something for prying my couch potato buns off the sofa to drag me through the woods, with the hopes that I would appreciate nature. Back then, ...

A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

Jupiter, roughly 562 million miles from Earth today, has nearly 100 moons. But Batygin and his collaborator Fred Adams' research focused on two of the smaller ones, Amalthea and Thebe. Both are inside ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.