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

Planet Y has not been directly observed, but its influence is apparent. Researchers studied roughly 50 icy objects beyond ...

The comet, named 3I/ATLAS, is only the third confirmed interstellar object ever seen in our solar system. That means it came ...

Astronomers have discovered seeds of rocky planets forming in the gas around the baby sunlike star providing *** peek into the start of our own solar system. The the thing that we've discovered is ...

Exoplanet hunters Christopher Watson and Annelies Mortier explain the long search for a 'twin Earth' capable of sustaining ...

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...

An instrument is set to improve the detection and direct imaging of planets outside our solar system by harnessing the power ...

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