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Old 04-02-2007, 07:56 PM   #11
xoxoxoBruce
The future is unwritten
 
Join Date: Oct 2002
Posts: 71,105
Quote:
Originally Posted by lumberjim View Post
oh....i thought there were 28 days in the moon's cycle.
Quote:
Originally Posted by Wiki
The phases of full moon and new moon are examples of syzygies, which occur when the Earth, Moon and Sun lie (approximately) in a straight line. The time between two full moons (or between successive occurrences of the same phase) is about 29.53 days (29 days, 12 hours, 44 minutes) on average. This synodic month is longer than the time it takes the Moon to make one orbit about the Earth with respect to the fixed stars (the sidereal month), which is about 27.32 days. This difference is caused by the fact that the Earth-Moon system is orbiting about the Sun at the same time the Moon is orbiting about the Earth. The actual time between two syzygies is variable because the orbit of the Moon is elliptic and subject to various periodic perturbations, which change the velocity of the Moon.
Looks like it's as variable as my exs.
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