NASA has discovered a new world, named Gliese 12 b. It is roughly the size of Earth, lies in the habitable zone, and orbits every 12.8 days.

Only a few years ago, astronomers heralded the discovery of a rocky world circling the sun 's closest space neighbor, Proxima ...

Our planet's closest and brightest neighbor will pass approximately between the Earth and sun this week, in what's called an ...

Scientists are using an array of instruments to detect other planets, some of which may harbor life—and others that most ...

Astronomers have confirmed the existence of four rocky planets orbiting Barnard’s Star, our nearest solitary stellar neighbor ...

This illustration shows what the planetary system may look like from one of the rocky ... Pollard A quartet of Earth-like worlds, each about 20% to 30% the size of our planet, circle one of ...

Venus will pass between the Earth and sun on Saturday ... Venus has phases just like the moon. Before and after the conjunction, Venus looks like a thin crescent—though only telescopes can ...