A study suggests an Earth-sized planet, dubbed Planet Y, may exist beyond Neptune, affecting the orbits of icy objects in the Kuiper Belt.

In particular, planet d seems like a real blow to our hopes of finding a world with an Earth-like atmosphere around TRAPPIST-1 because it resides on the inner edge of the system's habitable zone.

Our TV movie pick for today (2 September) is The Day the Earth Stood Still, the 2008 sci-fi remake starring Keanu Reeves (The ...

As another world around TRAPPIST-1 shows no signs of an atmosphere, astronomers urge us not to give up hope for an Earth-like atmosphere on one of the other worlds in the system.

Forget Planet X! Beyond Neptune, There Might Be An Earth-Sized Planet Y A warp in the outer Solar System could be explained by a new, unseen planet.

Two conspiracy obsessed young men kidnap the high-powered CEO of a major company, convinced that she is an alien intent on ...

NASA’s charter clearly states the agency should study planet Earth, however.

For decades, scientists have known that solar flares—huge bursts of energy from the sun’s outer atmosphere—can reach ...

On Wednesday (Aug. 13), NASA announced that the four satellites of its exciting new sun-studying mission, PUNCH, have successfully reached their stations in orbit around our planet.

The “Alien” franchise gets an exciting new entry in its first TV series, “Alien: Earth,” which explores life on our planet in the context of the hunt for xenomorphs to study and weaponize ...

The exoplanet TRAPPIST-1 d intrigues astronomers looking for possibly habitable worlds beyond our solar system because it is similar in size to Earth, rocky, and resides in an area around its star ...