NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: thule greenland
From: Bill Noyce
Date: 2006 Aug 30, 12:30 -0500
My bedroom window faces south, and I've often been struck by
how high the full moon gets in the winter. Since it stays near the
ecliptic, the winter full moon will have a declination near that of
the summer sun, and vice versa, as Fred points out. First and
last quarter moon on the solstices should be near zero declination.
-- Bill
On 8/29/06, Fred Hebard <Fred@acf.org> wrote:
>
> It depends on the phase of the moon. When it's opposite the sun,
> full, it's declination is approximately the inverse of the sun's
> declination. For instance, on June 21 (summer solstice), the sun is
> at approximately 23 N and the moon at approximately 23 S, if the moon
> is full on that date. Clearly, inverse is not the correct term for
> this relationship, but....
>
> Fred
>
> On Aug 29, 2006, at 2:29 PM, coralline algae wrote:
>
> > I am reading through a book - The Last Kings of Thule by Jean
> > Malaurie
> > about his time in a small encampment north of thule, greenland
> > around 1950.
> > While reading through a passage concerning travel during the
> > wintertime
> > and the darkness there was mention of the moon providing some light.
> >
> > Assumptions on my part:
> > during the summer with the long daylight the moon isnt much of a
> > factor
> > during the winter the moon may be the only light visible other than
> > starlight.
> > If the ecliptic is tilted such that the sun never rises in the
> > winter, then wouldnt
> > it also be the case that the moon never rises or only slightly
> > above the horizon
> > in winter? If that is the case that means the winter darkness is
> > even more total.
> > Malaurie point out in the book that during the winter a type of
> > depression
> > overcomes some of the inuit and even the dogs.
> >
> > >
>
>
> >
>
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From: Bill Noyce
Date: 2006 Aug 30, 12:30 -0500
My bedroom window faces south, and I've often been struck by
how high the full moon gets in the winter. Since it stays near the
ecliptic, the winter full moon will have a declination near that of
the summer sun, and vice versa, as Fred points out. First and
last quarter moon on the solstices should be near zero declination.
-- Bill
On 8/29/06, Fred Hebard <Fred@acf.org> wrote:
>
> It depends on the phase of the moon. When it's opposite the sun,
> full, it's declination is approximately the inverse of the sun's
> declination. For instance, on June 21 (summer solstice), the sun is
> at approximately 23 N and the moon at approximately 23 S, if the moon
> is full on that date. Clearly, inverse is not the correct term for
> this relationship, but....
>
> Fred
>
> On Aug 29, 2006, at 2:29 PM, coralline algae wrote:
>
> > I am reading through a book - The Last Kings of Thule by Jean
> > Malaurie
> > about his time in a small encampment north of thule, greenland
> > around 1950.
> > While reading through a passage concerning travel during the
> > wintertime
> > and the darkness there was mention of the moon providing some light.
> >
> > Assumptions on my part:
> > during the summer with the long daylight the moon isnt much of a
> > factor
> > during the winter the moon may be the only light visible other than
> > starlight.
> > If the ecliptic is tilted such that the sun never rises in the
> > winter, then wouldnt
> > it also be the case that the moon never rises or only slightly
> > above the horizon
> > in winter? If that is the case that means the winter darkness is
> > even more total.
> > Malaurie point out in the book that during the winter a type of
> > depression
> > overcomes some of the inuit and even the dogs.
> >
> > >
>
>
> >
>
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---