Two On A Big Ocean The Story of the First Circumnavigation
of the Pacific Basin
in a Small Sailing Ship


      

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Re: Speaking of the Moon..


Subject: Re: Speaking of the Moon..
From: Roger M. Derby (derbyrm@XXX.XXX)
Date: Wed Feb 07 2001 - 00:09:17 EST


Haven't given it much thought, but my first reaction is: the phase only
tells you the angular position of the moon relative to an earth-sun line.
The upper/lower limb question would depend on whether the moon is above or
below the ecliptic, or am I mistaken in thinking the moon's orbit is
inclined slightly from the ecliptic?

Roger

----- Original Message -----
From: "Pierre Boucher" <pboucher@XXX.XXX>
To: <NAVIGATION-L@XXX.XXX>
Sent: Tuesday, February 06, 2001 11:20 PM
Subject: [NAV-L] Speaking of the Moon..

> Your comments please.
>
> Over the year, when a partial moon is visible, sometimes only the UL is
> available and some other times, only the lower limb is available for the
> same phase of the moon but at different dates.
>
> I gave a call to my local planetarium and could not get a solid
explanation.
>
> Pierre Boucher
>
>
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