by Emily Lakdawalla
Follow the thrilling adventures of planetary missions, past and present, and see the stunningly beautiful photos that they return from space!
• 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.
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