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

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 ...

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

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

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

The ringed planet reaches opposition and the Moon occults Jupiter in a rare event not to be missed in the sky this week.

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

From the Crab Nebula to the Orion Nebula, these 10 winter deep-sky objects are easy to find and perfect targets for small ...

Since ESA’s Herschel observatory went dark in 2013, no space telescope has been observing in the far-infrared. NASA's new ...

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

A crescent Moon passing in front of our solar system’s largest planet is a rare and brilliant sight. Here's how to see it for ...