In August 2021, the year's farthest quarter moon occurs as the moon reaches last quarter and closest lunar apogee at nearly the same time.

Capture the Atlas announced its 2021 Milky Way Photographer of the Year. This annual edition showcases 25 of the best Milky Way photos from around the world.

Unexpected Perseid outburst on August 14, 2021. Automatic all-sky cameras caught it, and observers in Wyoming, USA and Ontario, Canada made visual observations.

2021’s closest planetary conjunction favors Southern Hemisphere The closest conjunction of two planets for 2021 happens on August 19 at...

Observers using a good pair of binoculars or a small telescope can see events called transits on Jupiter, when a moon or its shadow passes in front of the giant planet.

Every late July and August, two excellent meteor showers overlap. Here's how to find the Perseid and Delta Aquariid radiant points.

Here are charts showing the late June evening sky in 2021, from master chartmaker Guy Ottewell. One looks west after sunset. One looks from above.

On the June solstice, the sun will set at the same time in New York City and St. Augustine, Florida. But New York will have an hour more of daylight. Why?

A magnetar is a strange and rare neutron star, generating almost incomprehensible amounts of energy that can be detected across the universe. How?

The upcoming eclipse season - featuring a total eclipse of the moon in late May 2021 and an annular or ring eclipse of the sun in early June - is unusual for featuring a short lunar eclipse and relatively long solar eclipse. Here's how to understand it in the context of 1,000 years of eclipses.