Sunday, February 26, 2012

Moon Mnemonic: Waxing-Waning

D = Doubling

C = Collapsing


Sam L. said...

Or: Wax On; Wax Off.

Texan99 said...

Well, thank you for that! I've often tried to keep straight in my mind whether the moon was waxing or waning by reasoning it out from the imagined orbital position, but it always defeats me, or anyway I don't have pencil and paper handy, or it's too dark to scribble and figure, or my brain has turned to mush with age.

It's handier than my husband's trick for remembering that egrets have black legs while herons have orange ones: alphabetical ('e" and "b" are low in the alphabet while "h" and "o" are high).