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.
Click to ENLARGE.
Over the last month or so I have posted photos, articles and a poem by Dick Byrd: lawyer, software entrepreneur, painter, poet, photographer, raconteur, Photoshop maestro, philosopher, writer, race car driver, mechanic & all-round-nice-guy.
Given his Photoshop wizardry, I always ask Dick as to how much Photoshop is there in a given picture — in this case, Full moon over ‘Mirror Lake’, that being where Dick currently lives, waterfront (though he has sold his place and moving ‘soon’).
This is what he said about this picture:
“Below is a photo of the moon setting over Mirror Lake in the evening from my kayak.
I photographed the shot of the moon and also the shot of the horizon over the trees while I was in my kayak. BUT, I used Photoshop to put the two photos together.
I’m concerned that I made the moon just a little too big. I wanted the “huge-Moon” affect you do get when the moon is close to the horizon, but I might have overdone it. What do you think?
This should set you up for this Wednesday’s rare Blue Moon Supermoon and partial eclipse.
Check Category ‘New Hampshire’.
The January 1, 2018 will be even closer than the December 4.
So, that is good. I will keep you posted.
Check Category ‘Astronomy’.
It will NOT be bad over New Hampshire tonight.
Try around 5:15pm looking East. Should be hard to miss.
Slight chance we might have some clouds tomorrow, Monday, November 14 — the main day so to speak.