A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and Earth. The authors dubbed it Planet Y.

The asteroid belt may seem permanent, but it is far from static. Its slow decline reveals a more violent past when more material collided with Earth and the Moon.

It's probably a comet, but it might be some sort of ancient alien spacecraft or probe. What's for sure is that the mystery surrounding an object known as 3I/ATLAS is becoming both more and ...

Asteroid ‘Families’ Reveal Hidden Histories and Impact Risks across the Solar System ...

Astronomers have long thought the universe should look generally the same in every direction, but an anomaly in the radiation from the big bang persists even after a new analysis from radio telescopes ...

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

The rate of finding these distant worlds has recently increased, with astronomers scrambling to accommodate the data ...

Astronomers have discovered a significant “growth spurt” in a rogue planet outside of our solar system. The free-floating planet is currently consuming gas and dust from its surroundings at a rate of ...

The question of whether life exists beyond our solar system is one of those mysteries that humanity can’t quite let go of. Every culture and every generation seems to return to it, and for good reason ...