📁 日食

Eclipses occur when a planet casts a shadow on a satellite or vice-versa. The term often refers specifically to eclipses of the Sun and Moon, in which case the planet involved is Earth.

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The Michelson Doppler Imager
http://soi.stanford.edu/
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The Analemma Project
http://www.steveirvine.com/analemma.html
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The Virtual Sun
http://www.michielb.nl/sun/kaft.htm
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