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Supermoon 2021: How to see the fourth biggest Full Moon of the year this weekend

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The Royal Observatory Greenwich explained: “The term ‘Supermoon’ originates from a concept in astrology, but has been adapted and given a strict definition within astronomy.

“If the Moon is within 10 percent of its closest distance of Full Moon, it is considered to be a Supermoon.”

When is the next Supermoon?

The exact date of the next Supermoon is something of a hotly debated topic.

Many astronomers stick to a strict definition of what makes a Supermoon, which only considers the closest Full Moons at perigee in a given year.

By this definition, there will be two Supermoons this year, on April 27 and May 26 respectively.



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