3. Waning Gibbous: Set the waning gibbous to rising. From the location of the Sun, it is 9 p.m. with a set
time of 9 a.m. Rotate the top piece so the waning gibbous Moon is traveling across the sky above the
horizon; notice that the left side of the waning Moon, as seen by the observer, is illuminated by the Sun.
We can turn the question around and ask: where in the sky is the Last Quarter Moon at noon? Turning the
top piece to noon the Sun on the meridian shows the last quarter Moon to be setting.