Repost: Understanding waning gibbous moonPosted: November 16, 2011
Originally posted May 20, 2011.
More gibbous moon goodies from EarthSky.org:
The waning gibbous moon also initiates a rash of questions about seeing the moon during the day. If it rises late at night, you know the waning gibbous moon must set after sunrise.
In fact, in the few days after full moon, you’ll often see the waning gibbous moon in the west in early morning, floating against the pale blue sky.