Astronomers have uncovered a massive gas planet in a place it should never exist, orbiting one of the smallest stars in the ...

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

Forty light-years away, seven Earth-sized planets orbit around a dim red dwarf star in one of the most tightly packed ...

In late April 2026, a long-period comet will swing through the inner solar system. It will likely be visible with binoculars, ...

Pluto's icy mountains have caught the fancy of star gazers and cosmos geeks. But a question soon arose: "Is this made by AI?" ...

Gaia data reveals signs of planets forming around young stars by measuring stellar motion, identifying planetary, brown dwarf, and stellar companions in early star systems ...

Our Solar System has eight planets, a few dwarf planets and more than 200 moons. But wait. Are you seeing double? Or did ...

While surveying distant worlds beyond our solar system, researchers unexpectedly obtained the first direct images showing ...

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously ...

A strange world just 47 light-years from Earth is rewriting what scientists thought they knew about alien planets. Hidden ...

Could the icy moons of our solar system hold life beyond our planet? Keith Cooper looks at how planetary scientists plan to ...

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.