if the moon is a full moon when it rises in the evening, which of the phases will it?

• Feb 14th 2011, 06:09 PM
benjixbunn
if the moon is a full moon when it rises in the evening, which of the phases will it?
if the moon is a full moon when it rises in the evening, which of the phases (shown below A-H) will it be when it sets?

http://i113.photobucket.com/albums/n.../untitledv.jpg
• Feb 14th 2011, 06:16 PM
topsquark
Quote:

Originally Posted by benjixbunn
if the moon is a full moon when it rises in the evening, which of the phases (shown below A-H) will it be when it sets?

http://i113.photobucket.com/albums/n.../untitledv.jpg

Which phase corresponds to a full moon? There's no reason for it to change over night.

-Dan
• Feb 14th 2011, 06:20 PM
benjixbunn
So its "D"?

thats what i thought,

thanks!
• Feb 15th 2011, 11:32 AM
SammyS
Technically, the moon is full for only an instant. It's hard to say whether 12 hours may be considered enough time for the phase to have changed.
• Feb 23rd 2011, 12:11 AM
CaptainBlack
Quote:

Originally Posted by benjixbunn
if the moon is a full moon when it rises in the evening, which of the phases (shown below A-H) will it be when it sets?

http://i113.photobucket.com/albums/n.../untitledv.jpg

It will be technically full for an instant, to the casual observer it will still be full 12 hours later. To the careful observer it may be noticeable that it is not full, but which edge is in shadow depends on where you view from and your orientation. The series of diagrams presented correspond approximately to the view from a pole, and which direction is waxing/waning depends on which pole.

CB