Re: phases of moon question
- From: Mike Williams <nospam@xxxxxxxxxxxxxxxxxx>
- Date: Tue, 18 Mar 2008 04:47:44 +0000
Wasn't it Neil W who 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?
It could be either.
On 16 Jul 2008 I will see a moonrise at 20:56:00 when the moon is at phase 94.7 and 2 days short of being full, but an observer 20 degrees south of me sees the 16 Jul moonrise at 19:10:37. Their 21:08:38 moonrise occurs on 19 Jun 2008, one day after the full moon.
If you allow for daylight savings time, then the 23 Aug 2008 moonrise at 21:09:22 DST from where I am will almost be last quarter: Phase 61.9%. (Last quarter will be achieved at 01:49 24 Aug 2008.)
--
Mike Williams
Gentleman of Leisure
.
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