Yet despite the drumbeat of evidence, we still know of just one planet in the cosmos with life — the one you’re standing on.

The faraway exoplanet could help provide answers as to why there are hardly any planets with twice the diameter of Earth. A super-Earth that could explain the universe's mysterious lack of certain ...

All planets are made of gas, ice, rock and metal, and models of how planets form usually assume that these materials don't ...

The planet would be 10 times larger than Earth. It would be divided into five areas. The first would be called the Invention Zone. As the name suggests, people could invent new items with advanced ...

Proctor/J. Pollard A quartet of Earth-like worlds, each about 20% to 30% the size of our planet, circle one of our closest ...