Posts by 

Claudia Crowley

How big are asteroids? Compare sizes in this video

How big are asteroids? This video shows the sizes of 22 asteroids - ranging from tiny to vast - in comparison to New York City.

Megadrought may be worst in 1200 years

The megadrought of 2000-2021 might exceed the record droughts since the year 800 CE, causing disruption to life in the American West.

Shelf Cloud photos shared by readers

A shelf cloud, also known as an arcus cloud, forms at the leading edge of thunderstorms and signals that gusty winds are coming.

Moon phases 2021 in text format

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

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.

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.

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.

Photos of fiery Mars, at its best in 2020

Photos from the EarthSky community of the bright planet Mars, 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.