A Black Moon and Earthshine

Tomorrow night, April 30, 2022, there will be a Black Moon. It won’t look different, in fact, it won’t look like anything at all since a Black Moon is a name for a second New Moon in a single calendar month.

Full and New Moons can occur at different times because of time zone differences. It can even be in a different month. 

Black Moons may hold special significance to people who practice certain forms of Pagan religions and who believe certain actions become more potent when performed on the night of a Black Moon.

There was no New Moon in February this year which only happens about once every 19 years. There will be no Blue Moon in New York in 2022. That is a third Full Moon in a season with four Full Moons.

A sliver of a Waning Crescent Moon

The Waning Crescent Moon is the final stage of the lunar cycle and it begins when the sun illuminates less than half of the moon. This phase continues until the New Moon phase. This phase “ends” when the Moon and the Sun both rise at the same time, which starts the lunar cycle over again with the New Moon.

During this time, you can see the effect of “Earthshine.” It’s a matter of perspective. The Moon is always half-illuminated by sunlight just like Earth. A crescent Moon seen in the west after sunset or in the east before dawn is a sliver of the Moon’s lighted half.

When we see a crescent moon, that means that a nearly “Full Earth” appears in the Moon’s night sky. The full Earth illuminates the lunar landscape and that ic “Earthshine” – light from the nearly full Earth shining on the Moon.

Looking at Earth from the perspective of the far side of the Moon || Photo: Chinese Chang’e 5 T1 spacecraft

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Ken

A lifelong educator on and off the Internet. Random by design and predictably irrational. It's turtles all the way down. Dolce far niente.

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