The Danjon Scale is a five-step scale devised by French astronomer Andre-Louis Danjon to measure the brightness and color of the moon during a lunar eclipse.NASA: Danjon Scale
Why is a US billion (10^9) different to a UK billion (10^12)?(4 Answers)
A:
The first recorded use of long-scale terms ("bymillion" = 10^12, "trimillion" = 10^18) was in 1475. A 1484 article by a French mathematician extended the long scale as ...
my husbands job gave him a turkey but nowhere on it does it say how much it weighs! How can I find out?(1 Answer)
A:
Use a weighing scale that has a weight limit of at least 15 pounds. If you don't have an appropritate kitchen scale, borrow one or you can ...
References
Fast Facts
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L=0—A very dark eclipse
during totality, the moon is nearly invisibleUNC Chapel Hill: Danjon Scale
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Fact:
L=1—Moon is gray or brownishUNC Chapel Hill: Danjon Scale
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Fact:
L=2—Moon is deep red or rust-coloredUNC Chapel Hill: Danjon Scale
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Fact:
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Fact:
L=4—Moon is very bright copper-red or orangeUNC Chapel Hill: Danjon Scale
