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Analemma (via Bad Astronomy)
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Photographs of the Sun by Aspen Mays.
Top: Group of sun spots and veiled spots. Observed on June 17th 1875 at 7 h. 30 m. A.M. by E.L. Trouvelot
Bottom: Active Region 1302 (photo by Alan Friedman), which is several times larger than the Earth
The Aurora Borealis from Per Byhring on Vimeo.
A nice explanation of the Aurora Borealis and how it is caused.