rocky worlds like our own are abundant in our galaxy. — Alien landscapes: 15 places on Earth that look exoplanetary — Planet classification: How to group exoplanets — 10 weird water worlds ...

Their results, published in The Astronomical Journal this week, suggest that an Earth-like planet orbits one in every four sun-like stars. Totaled up, that means there could be up to 10 billion ...

NASA has identified 10 planets orbiting ... the surface of a rocky planet. "The Kepler data set is unique, as it is the only one containing a population of these near Earth-analogs – planets ...

Seven of the 10 newfound Earth-size planets circle stars that are just like ours, not cool dwarf ones that require a planet be quite close to its star for the right temperature. That doesn't mean ...

NASA has discovered 10 brand-new planets which it believes are Earth-like, within the habitable zone and so could theoretically support alien life. The announcement came as part of a wider press ...

We still don’t have any idea what the planets look like, or if water in any form actually exists on them. Still, filtering out the most likely life-supporting planets is a huge step towards ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

Now astronomers have detected the ruins of ancient planets around two unusual white dwarf stars, including an Earth-like world that existed almost 10 billion years ago. When most stars ...