Mercury and Regulus form a close pair on July 28

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Mercury and Regulus form a close pair on July 28

Mercury and Regulus will be close to each other on July 28. In fact, they'll be 1/5 the diameter of the moon from each other. Wow! Don't miss this lovely pair.

Marcy Curran

July 28, 2023

7 fireballs in 1 night! The Alpha Capricornids roar

This week, a camera saw 7 fireballs in 1 night! If you wish to see some celestial fireworks, the Alpha Capricornids are active all night long this time of year!

Robert Lunsford

July 28, 2023

Volcanism on Venus fueled by powerful ancient impacts

A new study says that high-speed impacts fueled early volcanism on Venus, explaining why Venus' surface is geologically young despite a lack of plate tectonics.

Paul Scott Anderson

July 27, 2023

Beluga Boat cam now live! And well worth watching

Click into these videos to see the Beluga Boat cam, from Manitoba's Churchill River. Belugas live, hunt and migrate in "pods." Hear their vocalizations!

Editors of EarthSky

July 27, 2023

The best place to find life on Mars may be Mawrth Vallis

Mawrth Vallis may be the best place to find life on Mars. This valley spans from the highlands to the lowlands and contains signs of previously flowing water.

Kelly Kizer Whitt

July 27, 2023

World’s biggest permafrost crater growing, as Earth warms

New drone footage has revealed details of the world's biggest permafrost crater - Batagaika Crater in Russia's far east - and its rapid growth.

Dave Adalian

July 26, 2023

2-faced white dwarf star surprises astronomers

For the 1st time, astronomers have discovered an unusual white dwarf star where one side is composed of hydrogen and the other side is helium.

Paul Scott Anderson

July 26, 2023

SpaceX launch punches a hole in the ionosphere

On July 19, 2023, astrophotographers captured a strange red blob in their images, which turned out to be a SpaceX launch punching a hole in the ionosphere.

Kelly Kizer Whitt

July 26, 2023