Quote:
Originally Posted by Tugboat
now I think I have it,
Once in a blue moon.
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That is perfectly what it is.
Once in a blue moon. Which is the calendar trick and no change of moon's actual color, when moon is seen for the second time in a single month as Moon's cycle (synodic cycle) is 29.53 days, while the month's cycle (Metonic cycle) 30.44 days. This happens once, evey 2 to three years, that is 7 times in 19 years!
Didn't I say, it is easy!
Congratulation again Trena. Its on you now.