Astronomy
The Moon
Lunar Phases

When the moon's illumination is decreasing with each passing day it is said to be what?

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April 27, 2016 2:31PM

Waning

Waning means decreasing in size, as the Moon moves from the Full Moon toward a New Moon.

Waning Gibbous - moving from Full Moon to Last Quarter

Waning Crescent - moving from Last Quarter to New Moon