UNI NEWS SERVICES - As if 2020 hasn’t been strange enough, this Halloween will feature an unusual celestial treat - the first worldwide blue moon in 76 years.
While a Halloween blue moon comes once about every 19 years to specific time zones (the Midwest last saw one in 2000), the last truly global blue moon was in 1944, according to the Farmer’s Almanac. If the weather cooperates on Oct. 31, Iowa trick-or-treaters will be able to gather candy under the pale light of a rare moon.
UNI astronomy professor and department head Siobahn Morgan is available for interviews on the topic.
“A blue moon is a full moon that happens twice within one calendar month,” Morgan said. “Because the time for a full moon to repeat itself is a little more than 29 days, that doesn't always fit in a single calendar month.So the rarity of having it in the early part of the month and again in the late part of the month is why we have the expression ‘once in a blue moon.’”