*SCALPSWINGSTRADDLE*

[JohnnyWinter]

Message from a fellow ultra-runner...........




"Greetings, and happy Sunset Day to all! This is the day of the earliest sunset of the year in mid-northernlatitudes; after today, the sunsets begin, ever so slowly, to belater, according to clock time.

If you aren't familiar with this interesting phenomenon, you can readmy personal take on it in my article on the subject.

It's in theWeather page of the DRS private pages -- see the top paragraph: http://storm.cadcam.iupui.edu/drs/private/weather.html

username dead

password qlsr

For a technical explanation at a nicely done web site (requires Javaand Quicktime; be sure to keep going past on the second page-- use the arrow at the page bottom):

http://www.analemma.com/

I've been evangelizing on this subject for years, but the author ofthat website is way ahead of me. In particular, I recommend hisfree app, SunGraph, which runs on both Mac OS and Windows.It has many wonderful features. The download page is a little hardto find from the site above, so here's the URL:

http://www.analemma.com/SunGraph/index.html

Some additional resources:

- To find the sunrise/sunset for any day of the year, at any city orairport on earth, see

http://www.mindspring.com/~cavu/sunset.html

- To see the Dennis diCicco photo mentioned in my article, see

http://www.uwm.edu/People/kahl/Images/Weather/Other/analemma.html

or

read a short bio of the astronomer himself, at the Sky&Telescopeweb site:

http://www.skyandtelescope.com/about/generalinfo/3305176.html?c=y&page=1


Another more recent effort at the same thing was done by aUkrainian astronomer:

http://apod.nasa.gov/apod/ap070617.html

Now, I know that this is somewhat latitude-chauvinistic. Sunset Day is8 December, or close enough, for 32N to 45N latitude. Empirically, itappears to be about 12 December at Cambridge, UK (52N) and perhaps 14December at Edinburgh (57N). (As for Australia, it's irrelevant --you'll have to make do with enjoying summer!) But the principlementioned in the article is at work in all the non-tropical north.

May all your sunsets be later!


Doug Dodds([e-mail])Cambridge, Mass., USA "



YAK, I hope you have been well!


Have a good weekend SSSers !!!