Sunday, December 18, 2005

I Dunno...Anyone??

My brother would like to know...

"So....there's a lead up to the question/request....I'm looking for the correct lattitude.
If one goes far enough North, after the first day of Summer, the days start to get shorter, and the arch of the sun through the sky gets shallower in each day. As we approach the first day of Winter, the arch gets very close the horizon, the days get very short, and..again if one is far enough North, there is a day when the arch of the sun does not break the horizon. I am looking for the lattitude where this occurs on or about the first day of Winter. If one goes too far North, I expect that this event occurs earlier than that. I'm searching the web at this moment, but not finding anything. I may send an e-mail to "ask an astronomer, or geographer, perhaps a sailor (seaman)"
Any ideas?
Lyvvie's Brother

Well...anyone got any ideas??

Remember the 21st is the shortest day of the year for we norther hemispere sorts. You lucky atipodeans have the longest day. so just think about it, we can now look forward to each day growing slightly brighter, unless you live in down under, where you'll soon be losing light and disappear into darkenss. I'm not jealous.


tornwordo said...

I believe the "arctic circle" (visible on any globe) delineates the point where on the winter solstice, the sun fails to rise.

cmhl said...

NO clue--- none. haha.

Manblogger641 said...

Sorry, I dont have anything on this one.

Lightning Bug's Butt said...

I think tornwordo is right.

geezer squeezer! said...

your bro needs a girlfriend.
hello darlin! sassy face looks way cute with mona!
we got ours in the post too (vern).hes hot! glad youre well! xoxox

NWJR said...

Yeah. tornwordo is exactly right.

The Arctic Circle is one of the five major circles of latitude that mark maps of the Earth. This is the parallel of latitude that (in 2000) runs 66° 33' 39" north of the Equator. Everything north of this circle is known as the Arctic, and the zone just to the south of this circle is the Northern Temperate Zone.

The Arctic Circle marks the southern extremity of the polar day of the summer solstice in June and the polar night of the winter solstice in December.

Within the Arctic Circle, the arctic Sun is above the horizon for at least 24 continuous hours once per year, in conjunction with the Arctic's Summer Solstice - this is often referred to in local vernacular as midnight sun.

Likewise, in conjunction with the Arctic's Winter Solstice, the Arctic sun will be below the horizon for at least 24 continuous hours. (In fact, because of refraction and because the sun appears as a disk and not a point, part of the midnight sun may be seen at the night of the summer solstice up to about 50' (90 km) south of the geometric arctic circle; similarly, at the day of the winter solstice part of the sun may be seen up to about 50' north of the geometric arctic circle.

This is true at sea level; these limits increase with elevation above sea level, however in mountainous regions there is often no direct view of the horizon.)
The position of the Arctic Circle is determined by the axial tilt (angle) of the polar axis of rotation of the Earth on the ecliptic. This angle is not constant, but has a complex motion determined by many cycles of short to very long periods.

Due to nutation the tilt oscillates over 9" (about 280 m on the surface) over a period of 18.6 years. The main long-term cycle has a period of 41000 years and an amplitude of about 0.68°, or 76 km on the surface. Currently the tilt is decreasing by about 0.47" per year, so the Arctic Circle is moving north by about 14 meters per year.

Countries which have significant territory within the Arctic Circle include:

Denmark (Greenland)
United States of America (Alaska)

(I stole this, of course. I'm not that smart; I'm just a smartass.)

Lyvvie said...

I would like to thank you all for your help, on behalf of my happily married brother (Geezer! Outrageous...) who's doing research into astronomy's influnces over local/ancient relegious folklore and how it lead to modern day relegion. You know, for fun!

SafeTinspector said...


Maja said...

It's fuggin' 'ot here, that's all I have to say.

Maja said...

Hey Lyvvie, I was just remembering, when I was in Saudarkrokur, Iceland, over the winter, there was a month or so where we didn't see the sun make it over the horizon, but Saudarkrokur isn't quite in the Arctic circle, it's due south of it.

Check out this real-time web cam at Saudarkrokur:

geezer squeezer! said...

married! thank god.

listen LYVV! heres hoping you and your lovely family have a wonderful lovey christmas with all the trimmings!(i expect photos of the kids starwars toys)
geezer n maja! xoxoxoxoxoxoxoxoxoxoox

Gerbera Daisy said...