Astronomers are closing in on what looks like a rare prize: a world almost the size of Earth, circling a Sun-like star at a distance that gives it a familiar, year-long orbit. The candidate, known as ...

It's remarkably similar to Earth.

The planetary system, located 120 light-years away, features four worlds orbiting a red dwarf star and challenges classical formation schemes.

NASA has announced the discovery of an Earth-like planet orbiting a Sun-like star that shares several other similarities with ...

A newly identified planet candidate, HD 137010 b, looks strikingly Earth-like in size and orbit — but it may be colder than Mars due to its dimmer star. If it has a thick enough atmosphere, though, ...

The planet is one of the best worlds for follow-up studies to determine whether it could be habitable or not.

Alexander Venner picked his way by hand through the data collected by a now-retired NASA telescope called Kepler, which examined the sky for exoplanets ...

All seven roughly match the size and mass of our own planet and are almost certainly rocky. Researchers announced Wednesday the stunning discovery of seven Earth-like planets orbiting a small star in ...

A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, scientists say.