Astronomers are researching an Earth-like exoplanet that could contain water, according to NASA. The exoplanet, named ...

The Solar System is home to a remarkable range of planets, from tiny rocky worlds to massive gas giants. But just how big are ...

A layer of diamonds up to 18 kilometers (11 miles) thick could be tucked below the surface of Mercury, the solar system's smallest planet and the closest to the sun, according to new research. The ...

Diamonds aren't the traditional 20th anniversary gift, but we're not going to complain, since these came from a spacecraft that crashed into the surface of Mercury back in 2015. NASA's MESSENGER ...