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1AU = 1 Astronomical Unit =  • Wednesday, October 28, 2020 | 6:44:26 am EDT | Day 301 = 82.2% of year •  • 

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5 Astronomical Moonths

Moonth 1

5 types of astronomical months

A MOONth is a more accurate word for a month because the Moon's motions completely determine this time interval. Our civil calendar of 28, 29, 30, or 31 days per “calendar month” is used to synchronize to the astronomical "phase month" of 29.530589 days it typically takes the Moon's phase cycle to repeat, i.e. the time interval from one New Moon to the next New Moon. Read more


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