It’s good to know your waxing (growing) from your waning (shrinking), and that a gibbous is the shape of the moon when you take a crescent of shadow from a circle of light, and that the hardest moon to see is a new one.
Or, as a reader passed on (thanks Iris):
If it’s light on the right, it’s gonna get bright. If it’s light on the left, it ain’t.
Like the moon? Apparently so do I: See the moon illusion, super moon, one side of the moon or just sketchplanations > astronomy.
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