BOSTON (WBZ NewsRadio) — Monday night marks the arrival of a celestial event that will happen only twice this year: a supermoon.
The Pink supermoon is tonight, when the moon nears its closest point in its orbit around the earth, or its perigee. The moon won't appear pink in the sky however — the Farmer's Almanac said April's full moon is traditionally called the "Pink" moon because of the plant Moss Pink, which flowers around this time of year in the eastern and central U.S.
NASA said the moon will be at its fullest just after 11:30 PM Monday night. The supermoon rises to its highest height around half an hour later, at around midnight.
Astrologer Richard Nolle invented the term "supermoon" in 1979 to refer to when the moon was within 90% of its perigee, NASA said. The Pink supermoon will appear full in the sky through Wednesday night.
The other supermoon this year is next month, on May 26.
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(Photo: Getty Images)