Astrophysicist and author Neil deGrasse Tyson explains the theory behind the growing evidence about a possible hidden planet ...

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

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

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 ...

While Planet Y has been not yet been directly observed, unexpected inclinations found in the orbits of roughly 50 distant ...

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

Mike Tirico Delights Viewers By Calling Bills Fan Running Up Stairs With Football ...

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

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

ESO's Very Large Telescope has observed a rogue planet and revealed that it is eating up gas and dust from its surroundings ...

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

I recall as a child lying on the grass at night, gazing up at the stars, and wondering if any of those distant suns had planets orbiting nearby. I was not ...