Re: phases of moon question
- From: Barry Schwarz <schwarzb@xxxxxxxx>
- Date: Mon, 17 Mar 2008 22:47:48 -0700
On Mon, 17 Mar 2008 22:49:28 -0400, "Neil W" <neilw@xxxxxxxxxxxxxxxx>
wrote:
I can't help but think that this is a trick question on a quiz.
If you see the moon rise at 9 in the evening then it should be a waxing
gibbous (heading towards full), because the the earth rotates clockwise, and
the moon revolves anti-clockwise around the earth, right?
The answer on the quiz is a waning gibbous. Who is correct, the instructor
or me?
Consider the average situation. A full moon will rise at 6PM just as
the sun sets.
If the moon rises earlier, it is in the sky with the sun. It has not
yet reach full and must be waxing.
If it rises later, the sun has already set. It is past full and must
be waning.
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