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Sirius in many colors
When you see the sky's brightest star - Sirius - low in the sky, you're seeing it shine through an extra thickness of Earth's atmosphere. At such times, its colorful flashing might surprise you.
December 15, 2017
A grand year for the Geminids
The 2017 Geminid meteor shower was thought to have a better-than-average chance of producing a rich display, since the Geminids' parent body - a strange rock-comet called 3200 Phaethon - is nearby. And so it was! Photos here.
December 15, 2017
Long-lasting moon halo
Halos around the sun or moon are caused by ice crystals, like those in high cirrus clouds. Sometimes you can't see clouds, but - in these photos - you can.
December 12, 2017
Shining sea and sky
"When phytoplankton come near the beach, you can see this amazing scene. There is light in the sea and sky," said Mohammad Rouhbakhsh of Iran, who captured this image.
December 11, 2017
California in flames
According to the California Department of Forestry and Fire Protection, the 2017 California wildfire season is the worst on record.
December 9, 2017
Asperitas clouds over Tenerife
Meet Earth's newest named cloud, the asperitas cloud, 1st new addition to the International Cloud Atlas in over half a century.
December 8, 2017
Christmas lights and the king tide
Mimi Ditchie captured this photo at low tide on Monday - the day of the king tide at Pismo Beach, California - following Sunday's supermoon.
December 7, 2017
See it! December’s full supermoon
December's full supermoon was the closest and brightest full moon of 2017. Wonderful photos here from the EarthSky community around the world.
December 4, 2017
Land of Terror
This looks like an abstract painting, but it's a satellite image of the Tanezrouft Basin, a part of the Sahara Desert in central Algeria known as the Land of Terror.
December 3, 2017
