Thursday, February 19, 2015

Native American Skies: Lunar Standstil

197px-Ecliptic_plane_3d_viewHave you noticed how fast the earth has been moving lately?  Probably not, but in fact the earth moves faster in the winter than in the summer.  The reason is because the earth moves around the sun in an elliptical orbit, not circular, so as the earth gets closer to the sun it speeds up and as it flies away from the sun it slows down.  In North America, the winter half of the year is approximately eight days shorter than the summer half.
 

 

 

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