NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: thule greenland
From: Fred Hebard
Date: 2006 Aug 30, 21:56 -0500
Yes, that's correct. It doesn't get very high, however, because of
the latitude, and is too dim to burn through much of a cloud layer.
When it's full, it gets highest around 12 midnight or thereabouts.
Fred
On Aug 30, 2006, at 6:23 PM, coralline algae wrote:
> Assuming a visible full moon in thule, greenland
> then it will be above the horizon most of the days hours
> even though the sun itself never rises. In the perpetual
> darkness of winter near the poles, the full moon provides
> a partial respite. Actually this is a guess on my part
> but then the logic seems sound.
>
>
> On 8/30/06, Bill Noyce < wbnoyce@gmail.com> wrote:
> 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: Fred Hebard
Date: 2006 Aug 30, 21:56 -0500
Yes, that's correct. It doesn't get very high, however, because of
the latitude, and is too dim to burn through much of a cloud layer.
When it's full, it gets highest around 12 midnight or thereabouts.
Fred
On Aug 30, 2006, at 6:23 PM, coralline algae wrote:
> Assuming a visible full moon in thule, greenland
> then it will be above the horizon most of the days hours
> even though the sun itself never rises. In the perpetual
> darkness of winter near the poles, the full moon provides
> a partial respite. Actually this is a guess on my part
> but then the logic seems sound.
>
>
> On 8/30/06, Bill Noyce < wbnoyce@gmail.com> wrote:
> 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
-~----------~----~----~----~------~----~------~--~---