A newly identified Earth-sized exoplanet with a year-long orbit may lie near its star’s habitable zone, but extreme cold could limit its chances of hosting liquid water.

SpaceX has formally acquired another one of Elon Musk’s companies, xAi, the space company announced on Monday afternoon.

This new potentially habitable planet is about 146 light-years away and has some conditions similar to that of Mars. The team ...

The moon is our nearest neighbor in space, at an average distance of about 238,000 miles. As it orbits our Earth every month or so, it appears to pass by ...

February stargazing is so special. Sure it’s cold but the extra special celestial jewels make it worth bundling up for. If you’re not already in the darker countryside, try to get out there. But ...

General relativity doesn’t just bend light, it can influence planetary orbits enough to wipe out entire systems.

A young star called V1298 Tau is giving astronomers a front-row seat to the birth of the galaxy’s most common planets. Four ...

Jupiter’s swirling storms have concealed its true makeup for centuries, but a new model is finally peeling back the clouds.

The moon is our nearest neighbor in space, at an average distance of about 238,000 miles. As it orbits our Earth every month or so, it appears to pass by stars and planets in our night sky … or, at ...

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.

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