• January 09, 2014
Earth's polar vortex has been in the American news all week. But we're not the only planet that has one; basically every world that has an atmosphere has a polar vortex. Here are lots of pretty pictures and animations of polar vortices.
• January 02, 2014
A baby Moon and aging Venus crescents are positioned close in the sky today, and lots of people are taking beautiful photos.
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