A day. The moon changes its appearance daily. "New moon" can be said to be the first 24 hours after the first sighting. The next new moon is on Saturday, 25 April 2009. The moon is barely visible at new moon being a very thin crescent. It can be seen for about 8-14 hours depending on latitude and season until it sets. The best view is just before sunset. The next 6 days are called "first quarter". See the related link for up-to-date actual moon data.
Waning gibbous
it was a cresent.
yes
It was a first quarter
There is no such thing, the saying 'once in a blue moon' is a way of saying never ^^^thats wrong. theres a blue moon tomorrow night. Wont be another one for 3 years.
no
it was a waxing gibbous last night (on Friday the 14th)
Tonight the 16th November 2009 is a new Moon, so last night there should have been no Moon visible.
full moon
the moon orbits. it circles around the earth.
Waning gibbous
it was a cresent.
yes
It was a first quarter
After 16 days.
Last night, September 11, 2010, the Moon was a waxing crescent, 2 days past the new.
There is no such thing, the saying 'once in a blue moon' is a way of saying never ^^^thats wrong. theres a blue moon tomorrow night. Wont be another one for 3 years.