J. Maciaszek, J. Stetson
Image taken:
Oct. 29, 2009
Location:
South Portland, Maine
Details:
As the sun rotates AR 1029 toward the limb, it appears to be foreshortened (compared to its appearance yesterday). That was one way that Galileo proved that sunspots were on the sun (transiting objects appear the same size and shape throughout a transit.)
 
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