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Here's why lunar eclipses are so rare

Jessica OrwigMar 23, 2016, 00:55 IST

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The first lunar eclipse of 2016 will take place on Tuesday, March 23. A lunar eclipse takes place when the Earth passes between the Moon and sun. If space were flat, we'd witness a lunar eclipse once a month, but we normally only see three to four lunar eclipses a year. This brilliant NASA video explains why.

Video courtesy of NASA

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