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

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

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

The Red Planet passes through M44, also known as the Beehive Cluster, a bright group of young stars in Cancer the Crab.

Saturn reaches opposition this month, Neptune lingers near Saturn, Mars transits the Beehive, and Jupiter is occulted by the ...

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 ...

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.

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

New Moon occurs at 11:50 A.M. EDT. With extra-dark skies, you’ve got a chance to spot the zodiacal light in the early-morning hours, reaching up from the eastern horizon before dawn. This faint glow ...

This dense globular cluster is the only Messier object in Capricornus, perfectly positioned for evening observing in the Sea ...