What’s a ‘Blue Moon’ in 60 Seconds

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What’s a ‘Blue Moon’ in 60 Seconds

by WSJ Live 0:55 mins

What’s a ‘Blue Moon’ in 60 Seconds

by WSJ Live 0:55 mins

‘Once in a blue moon’ there are two full moons in one calendar month. This rare occurrence is called a ‘blue moon.’ But does the moon really turn blue? Dipti Kapadia reports. Photo: NASA

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