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‘Black Moon’ Today, July 31, 2019, & How It Differs From A ‘Blue Moon’.

by Anura Guruge




The Key Difference:

Black Moon has to be a NEW Moon.

Blue Moon has to a FULL Moon.

Other than that they both refer to an ‘EXTRA’ moon in a given ‘month’.


Blue Moon‘ can mean one of two things:

1. Second full moon within the same calendar month.

2. Third full moon during an astronomical season that has four full moons; an astronomical season in this context being the 3-month period between an equinox and a solstice, e.g., 3-months between the March Spring Equinox and the June Summer Solstice.


Black Moon‘, DITTO, but when it applies to a NEW MOON.

So, it means:

1. Second NEW moon within the same calendar month — as is the case this month, i.e., July 2019.

2. Third NEW moon during an astronomical season that has four full moons; an astronomical season in this context being the 3-month period between an equinox and a solstice, e.g., 3-months between the March Spring Equinox and the June Summer Solstice.


Both are rare events.

Furthermore, today’s Black Moon is a Supermoon — i.e., it is closer to Earth than normal.


Related posts:
Search ‘blue moon’.
Check Category ‘Astronomy’.


by Anura Guruge

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About Anura Guruge

See 'The Blogger' on my https://nhlifefree.com/ blog.

4 responses to “‘Black Moon’ Today, July 31, 2019, & How It Differs From A ‘Blue Moon’.”

  1. Jonathan Caswell says :

    DIDN’T KNOW THIS!

  2. Jonathan Caswell says :

    Reblogged this on By the Mighty Mumford and commented:
    INTERESTING ASTRONOMY!

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