This article is from the Astronomy FAQ, by Joseph Lazio (jlazio@patriot.net) with numerous contributions by others.
Related questions include
B.11 Why does the Moon look so big when it's near the horizon?
B.12 Is it O.K. to look at the Sun or solar eclipses using exposed
film? CDs?
C.07 Easter
C.08 What is a "blue moon?"
C.11 How do I calculate the phase of the moon? and
C.13 Why are there two tides a day and not just one?
 
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