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While in the Eastern Time Zone, Friday night's full moon is a rare one.
Only about 1 percent of full moons occur on Friday the 13th somewhere in the world. This last happened in the Eastern time zone in June 2014, and we will not see another for 30 more years.
A micro moon, sometimes called a mini moon, is the opposite of a super moon. Super moons look a little larger and brighter in the sky, appearing at perigee, the closest point in the Moon's orbit to Earth.
Micron moons occurs at apogee, the furthest point in the moon's orbit, and a bit dimmer and smaller. Neither happen on Friday the 13th very often.
The last micro moon is on the 13th of July 1832 and will not be here again for more than 500 years.
There are 12,368 full moons across 1,000 years of the Gregorian calendar, first adopted on Oct. 15, 1582. Eighty-nine of them fall on Friday the 13th here in the Eastern timezone. Only micro moons oven and sic super moons fall on Friday the 13th. This calendrical coincidences are so rare because of the many ways to measure.
The Moon takes 27.32 days to complete an orbit around the Earth (a sidereal month). By then, the Earth has moved into a new position in its orbit around the Sun. The Moon needs another day to get back into the Sun (a synodic month), bringing on the new full moon.
Neither aligns the day of the week.
With a chance of evening thunderstorms Friday night, the microphone will be making an appearance between clouds.
Mark your calendar for the next big event in the sky, the transit of Mercury on Nov. 11, when Mercury will pass in front of the Sun. If you've kept your eclipse glasses from 2017 safe, they'll help you see the tiny planet as it moves around the Sun starting around 7:30 am and continuing over the next 5.5 hours.
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