Meteors streak past the stars as the First Quarter Moon shines and Iapetus reaches superior conjunction in the sky this week.

This unique pair of craters was created by just one impactor that skipped along the lunar surface, leaving a cometlike tail ...

Two jovian moons cross each other’s paths from our point of view, appearing to merge in the telescope eyepiece.

Integrity served as a deep-space testbed for technology that could aid cancer patients, serve remote clinics, and supercharge ...

Discover this year's most exciting new astronomy products selected by Astronomy's contributing editor and gear guru, Phil ...

The planet Mercury stands 25° east of the Sun. View the solar system’s smallest planet, along with the crescent Moon, in the ...

The Red Planet plows through an open cluster, Mercury reaches greatest eastern elongation, and New Moon brings darkness in ...

The ringed world’s brightest moon is passing north of its parent planet overnight tonight, making it particularly easy to ...

Extragalactic globular clusters millions of light-years away are hiding in your astroimages. Here’s how to find them.

Planet Venus comes to a halt against the background stars; catch it shortly after sunset along with Mercury, before the pair ...

Astronomers can use lensing to learn about everything from the makeup of the universe to the nature of extrasolar planets.