Scientists may have found a planet orbiting two brown dwarfs at a wild 90-degree tilt—something never seen before.

A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the ...

WASHINGTON: A group of scientists has found a strange new object about 435 miles wide at the far edge of the solar system. It ...

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

This illustration shows an exoplanet orbiting around two brown dwarfs –– objects bigger than gas-giant planets but too small to be proper stars. ESO/M. Kornmesser Astronomers have discovered a ...

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.

This question—are planets alive?—has sparked some of the most bizarre, heated, and thought-provoking debates in science. The idea might sound outrageous at first, but as we dig deeper ...

A planet twice the size of Jupiter has been confirmed in Nu Octantis. Its retrograde orbit and origin raise new questions about planetary formation in binary systems.

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

New research published in The Astronomical Journal suggests another explanation for these strange worlds, and they might mirror a planet in our own system. Don't Miss: Today’s deals: $399 iPad ...