Death of a snowflake

On the first day of spring for us in the Northern Hemisphere, check out this series taken yesterday of a snowflake, melting. Happy spring, everyone!

Amazing green flash atop sun pyramid

The green flash is an optical phenomenon you can see shortly after sunset or before sunrise. For a second or two, the upper rim of the sun flashes green.

Last night’s moon, planet Mars, star Spica

Cath Cooper - and others in EarthSky's community - caught last night's beautiful waning gibbous moon, red planet Mars and blue-white Spica, brightest star in Virgo.

Full moon over the Acropolis

Last night's full moon rising over the Acropolis of Athens, Greece

Space rainbow: Glory seen in Venus atmosphere

For the first time, a spacecraft has imaged a rainbow-like feature known as a ‘glory’ on another planet.

Summer stars coming into view at dawn

The three stars of the Summer Triangle - Deneb, Vega, and Altair - in the March morning sky over Pennsylvania

This tiny creature is called a tardigrade

Tardigrades are microscopic animals. They can go into a state of suspended animation and survive a long time without water or oxygen, even in the vacuum of space.

Sunset over the Ligurian Sea

The Ligurian Sea is part of the Mediterranean Sea. It's between the Italian Riviera and the island of Corsica.

Mars!

The best time to see Mars in two years is here. Check out these great telescopic images of the planet and its moons, taken last week.

New Hampshire seacoast sunrise

A wintery sunrise on the New Hampshire coast.