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Rare and beautiful Lowitz arc
The Lowitz arc is associated with the common 22-degree halo often seen around the sun or moon. It's rare, faint and fleeting.
December 9, 2015
Amazing photos of moon and Venus
Throughout the day on Monday, as the hours ticked by, the moon moved closer to Venus and ultimately passed in front of it. More photos!
December 7, 2015
Early Geminid fireball over Tucson
Geminids meteors are beginning to fly. The shower peaks on the night of December 13.
December 4, 2015
A new island turns two
Two years ago, during a volcanic eruption, a new island was born in the Pacific. It ultimately swallowed its neighbor. Before and after images from space, here.
December 3, 2015
Small Magellanic Cloud and 47 Tucanae
Two objects visible from Earth's Southern Hemisphere: An irregular dwarf galaxy near our Milky Way, and the second-brightest globular cluster in the sky.
December 2, 2015
Moon and Griffith Observatory
A bright moon seen Friday night from the famous Griffith Observatory in Los Angeles.
November 29, 2015
Winter begins in Wisconsin
Winter is coming to northerly latitudes ... A beautiful look at an early snowfall.
November 27, 2015
Morning planets over Aegean Sea
The planets are still striking before dawn in late November, 2015.
November 26, 2015
Circumhorizontal arc over Argentina
Don't call them "fire rainbows," experts say. They're not rainbows. And they originate with ice, not fire.
November 25, 2015
