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 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 ...

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

Saturn reaches opposition this month, putting on a fine show. Mercury is briefly visible early in October, while Venus ...

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 ...

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