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

Scientists announce detection of compounds on an extrasolar planet that on Earth only produce living organisms, but other ...

Astronomers have discovered the weirdest planetary system ever seen, consisting of a planet rolling around rare binary ...

No, they’re not Earth 2.0. But they do share something in common with our planet: they’re solid, rocky ... by the gravitational pull of nearby orbiting planets. Detecting such small planets ...

Imagine setting out for a springtime stroll. Not here on Earth but on some distant planet — call it Novathis-458b — orbiting ...

Nowhere to be seen—at least not yet—is a solar system like ours, with solid planets near the sun and gas-giant planets ... tugged by the gravity of unseen bodies orbiting around them.

Imagine standing on the surface of Earth, feeling the wind on your face and watching clouds drift across the sky. Have you ...

We do have a fairly solid understanding of the star system ... Three years later, the hunt for the very first planet orbiting a sun-like star was complete when in January 1995 graduate student ...

The thin, outermost ring in the photo is composed of particles shepherded by the gravity of two moons orbiting around it.

Trump aims to send a crew to Mars by the end of his term, which Musk calls 'doable.' Astronauts question the time frame but ...