Tiny grains from a distant asteroid are revealing clues to the magnetic forces that shaped the far reaches of the solar ...

Billions of years ago, Earth was home to extreme environments, including intense UV radiation, frequent volcanic eruptions, ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the ...

Avi Loeb's controversial claim that a recent fireball resulted from an interstellar object is taking a hammering.

Fastest Known Planetary System May Have Been Pushed by Our Galaxy’s Supermassive Black Hole ...

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

They sometimes call it the Goldilocks zone — not too hot, not too cold. The habitable zone is the region of our Solar System ...

You may need binoculars or a telescope for this one. It includes the three furthest planets in our solar system.

A new study suggests that the planet’s icy interior and liquid ocean could be insulated with a three-to-six-mile-thick layer ...

Scientists speculate if Planet Nine is a new planet or a primordial black hole. Discoveries could redefine our understanding ...

The Subaru Telescope has discovered new objects beyond the known Kuiper Belt, suggesting a more complex structure at the edge ...

The smooth, planet-less disk of the Vega star system challenges planetary formation theories, suggesting alternative cosmic ...