There are blood moons and blue moons, and Harvest Moons, but what is a black moon?
The second new moon in a calendar month, or the fourth new moon in a 3-month season, is sometimes called a black moon.
In the Western Hemisphere on Friday, September 30, there will be a black moon.
Can you see the black moon? Although the moon will turn new on Friday, September 30 at 8:11 p.m. Eastern time, even if it's a clear night, we won't be able to see it. According to EarthSky, a new moon occurs when the moon's Earth-facing side is fully in shadow.
What is the earliest visible sighting of a new moon? According to Sky & Telescope--
The record for the youngest Moon ever seen with optical aid, 11h 40m past new, goes to Mohsen G. Mirsaeed of Tehran who saw it on September 7, 2002. The youngest crescent ever seen by the naked eye, 15h 32m, is still that observed in May 1990 by Sky & Telescope contributing editor Stephen James O’Meara.
You can read more about the thin crescent moons at Sky &Telescope, here.
What is the significance of a new moon? The sighting of the new moon marks important holidays in the Muslim calendar. In Western astrology, a new moon signifies new beginnings.
You can read more about the black moon at EarthSky, here.
Read more about a blood moon here.
Read more about a blue moon, here.
And, here's more about the full Harvest Moon.
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