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Subject: Re: moon visible by day...
From: Bruggeman, Jan (JanB@XXX.XXX)
Date: Tue Feb 06 2001 - 05:57:25 EST
hello all,
Sorry for eventual mistakes, I'm translating literally from dutch.
The day (24 h) is (used to be) divided into 4 "quarters", 2 for day (first
and last) and 2 for the night (also called first and last).
a celestial object is "visible" during more or less (see declination) 180
degrees of it's daily 360 degrees trip, thus is visible during 2 quarters.
a first quarter moon is visible during the "last quarter" of the day and the
"first quarter" of the night, hence it's name.
a full moon is visible during both first and last quarter of the night.
a last quarter moon is visible during the last quarter of the night, and the
first quarter of the day, hence it's name.
a new moon is visible during both first and last quarter of the ... day!
hope this helps,
mvg,
Jan Bruggeman - ON4AIN
mail : jan@XXX.XXX
web : http://jan.bruggeman.com
(btw, I'm new on this list. for my introduction, see my website. I'm quite
sure to find many interesting things on this list)
-----Original Message-----
From: Russell Sher [mailto:rsher@XXX.XXX]
Sent: dinsdag 6 februari 2001 11:39
To: NAVIGATION-L@XXX.XXX
Subject: moon visible by day...
I'm often intrigued by comments from people about the moon being visible
over here during the day. (I'm in Cape Town at 34 deg south) Is this unusual
in any other parts of the world since I had always assumed that it would be
equally visible by day else here? Or is this just ignorance because the moon
is assumed to be nocturnal?
regards
Russell
ily
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