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 ...

A bus-size asteroid is racing through space on a trajectory that will bring it close to Earth, and NASA is watching it with ...

Astronomers are closing in on what looks like a colossal missing piece of the Solar System, a giant planet that appears to ...

The big astronomical event in February is a rare “planetary parade,” according to NASA. You’ll be able to see Mercury, Venus, ...

Researchers estimate that the planet has about a 50% chance of being in its star's Hoble zone.

Astronomers have found thousands of exoplanets around single stars, but few around binary stars—even though both types of stars are equally common. Physicists can now explain the dearth.

Using data collected by NASA's Parker Solar Probe during its closest approach to the sun, a University of Arizona-led ...

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

Astronomers have noticed something strange happening at the outer edge of our solar system: distant objects are moving in ways that shouldn’t be possible. One explanation is a massive, unseen planet ...

The next full moon will appear in the night sky Sunday, Feb. 1, but it you plan on stepping outside to watch it, bundle up.

Humanity has wrapped Earth in a growing halo of satellites, rocket stages and metallic shards, a messy byproduct of the space ...

Safety matters when four astronauts' lives are at stake.