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.

The EarthSky-recommended tide almanacs listed here are based on astronomical influences on the tides. They'll help you in finding the next high and low tides.

Here are the dates of all solar and lunar eclipses in the year 2021. Is there one you can see? The next one is a total lunar eclipse, coming up in May.

The king planet Jupiter reaches its equinox on May 2, 2021, an event that always causes mutual events of Jupiter's 4 major moons. It's an eclipse season of the moons.