Claudia Crowley
A composite of phases of the moon.

Moon phases 2021 in text format

Read a list of the phases of the moon for all of 2021.

Glowing blue double-ended blast from a brilliant white star.

Hubble sees the brightest kilonova yet

Observations by the Hubble Space Telescope reveal intense infrared radiation from an unusual kilonova probably created by the collision of neutron stars.

What are shelf clouds? Stunning photos here

Shelf clouds sometimes form at the forward edge of thunderstorms. See photos here.

Venus seen by BepiColombo

The sun’s second planet, Venus, as seen from the BepiColombo spacecraft as it passed on its way to the innermost planet, Mercury, earlier this month.

Irregular round, pink cloud with dark center against stair field.

A close look at the Rosette Nebula

The Rosette Nebula glows in this telescopic photo by EarthSky Community member William Shaheen.

Favorite photos of October’s young moon

In the past few days, several EarthSky Community members around the world shared their photos of the young moon, a thin crescent in the west after sunset. Beautiful! Thanks to all who contributed.

Orange ball with dark markings and white spot at the pole.

Photos of fiery Mars, at its best in 2 years

Photos from the EarthSky community of the bright planet Mars, now at its best. Earth passed between Mars and the sun – bringing the planet to a once-in-two-years opposition – on October 13, 2020.

Stunning images of the night

See the winners of the International Dark-Sky Association (IDA) 1st annual photography contest.

Young woman in long white dress on white horse under sky with many small, sunlit downward bulges from a dark cloud.

Epic graduation photo, Alberta, Canada

Spectacular mammatus clouds – and a rainbow – provide a backdrop for this beautiful and unusual graduation photo. Congratulations, Cheyann!

Very thin white crescent against gray background.

Farewell, Venus

Photos – taken through telescopes, or with other optical aid – from the EarthSky community. The brightest planet Venus is now in a thin crescent phase as viewed from Earth. Venus will go between us and the sun on June 3.