Question: How often is a eclipse? 

Answer: Eclipses of the sun and moon usually happen six months apart and then in a fortnightly patten when they do. As an example, there will be a penumbral lunar eclipse on March 14th 2006 and about a fortnight later there will be a solar eclipse on March 29th, similarily on September 7th 2006 there is a partial eclipse of the moon followed by a solar eclipse on September 22nd 2006.
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