Aurora lights on Uranus helped NASA’s Hubble Space Telescope measure the planet’s interior rotation rate, changing what astronomers know about how long a day is on the cold and windy world.

Nearly three-fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese ...

Glowing like a multi-faceted jewel, the planetary nebula IC 418 lies about 2000 light-years from Earth in the constellation ...

A new trail in this southern Arizona city plots the most visitor-friendly astronomy stops—and there are plenty to choose from ...

Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a compelling case that Earth's oceans were once green, in ...

The first samples returned from the far side of the Moon suggest it's 10-100 times drier than the side nearer Earth.

Hoping to catch a glimpse of the Amazon Atlas V rocket launch from New Jersey? Here's time of liftoff, maps and what cities in NJ have best views.

Skygazers are still waiting for the celestial event of the year, when a dance between two stars 3,000 light-years away ends in a massive explosion and creates a new dazzling temporary "star" in the ...