A newly discovered dwarf planet could hold the key to unlocking the mysteries of our solar system’s outer reaches — but what ...

The simulation of the Solar System that came the closest to the observation was the presence of a small planet, between the ...

A newly discovered space rock zoomed safely by Earth on Wednesday (Oct. 15) at only about a quarter of the average distance ...

With water being so important to life on Earth, scientists often look for it on exoplanets. But some of those worlds might ...

Astronomers have discovered a distant dwarf planet orbiting beyond Neptune — a frozen world so far from the Sun that it ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

When a Mars-sized meteorite slammed into Earth billions of years ago, the impact completely reset any and all chemical ...

Just as Earth orbits the sun, most planets discovered beyond our solar system orbit a host star. But some are out there all ...

Planet-heating methane is escaping from cracks in the Antarctic seabed, with new seeps being discovered at an “astonishing ...

Buried deep in Greenland's ice sheet lies a puzzling chemical signature that has sparked intense scientific debate.

From lava worlds to gas giants, NASA says the variety of these worlds is staggering—and that signs of a further 8,000 distant ...

SWAN is best viewed in the Southern Hemisphere. The comet crossed into the Libra constellation on September 28, and will make ...