The "waning gibbous" phase lasts from 2 days after the full to 6 days after the full.
The right half of the moon is illuminated.
Roughly approximately about 29.531 days, which is 4.2187 weeks.
On February 4, 2010, the moon was in the waning gibbous phase. At the beginning of 2/4 ... 00:00 GMT, it was 70.9% illuminated. 24 hours later, at the end of 2/4 ... 24:00 GMT, it was 60.6% illuminated.
Phase of the Moon on 19 December: waxing crescent with 10% of the Moon's visible disk illuminated. New Moon on 16 December 2009 at 4:03 a.m. Pacific Standard Time.
3/4 of the moon
If tonight the phase of the moon is full when it rises what will be the phase 4 days from now is in the waning gibbous stage.
The "waning gibbous" phase lasts from 2 days after the full to 6 days after the full.
The right half of the moon is illuminated.
It was a waxing gibbous, but right after a First-quarter moon.
It rises on June 4
Roughly approximately about 29.531 days, which is 4.2187 weeks.
The moon appears as a waxing (growing) crescent for about a week, between the moments of New Moon and First Quarter.
Today, January 1, 2011, the Moon is in the "waning crescent" phase with about 6% of the visible face of the Moon illuminated. There will be a partial solar eclipse on January 4, which can only occur at the precisely "new" moon.
On February 4, 2010, the moon was in the waning gibbous phase. At the beginning of 2/4 ... 00:00 GMT, it was 70.9% illuminated. 24 hours later, at the end of 2/4 ... 24:00 GMT, it was 60.6% illuminated.
Sunrise, Sunset, Moonrise, Moonset, and Moon Phase.
"First Quarter" is the phase when the moon appears half-illuminated, and rises and sets roughly 6 hours (1/4 day) after the sun.