the shadow of earth

Pretty amazing that you can learn new things after 30 years of existence or so it seems as i found out that Earth casts it own shadow in the atmosphere too , best viewed during sunrise and sunset.

for a more technical explanation read http://www.atoptics.co.uk/atoptics/earshad.htm

Looking  westward , towards Pacific Ocean in the Big Sur Coast, California before sunrise I shot this at 5:30 am

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