THERE will be a blue moon on Thursday as New Year's Eve revellers welcome in 2010 - the first time since 1990 that a blue moon has coincided with New Year's Eve.
A blue moon - the second full moon in a calendar month - occurs only every 2½ years on average. This month, full moons occur on December 2 and December 31.
An astronomer, David Reneke, from Australasian Sciencemagazine, said it was rare for the event to land on New Year's Eve, and it would not happen again until 2028.
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