Thats awesome - so stars follow a circular track, and other objects from a line ?
---------------------------------------------------------------------------- Andrew Rich VK4TEC [email protected] mailto:[email protected] http://www.tech-software.net
-----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Tom Clark, K3IO Sent: Monday, 31 December 2007 4:02 PM To: AMSAT BB Subject: [SPAM] [amsat-bb] Re: Dont loose the north Importance: Low
With all this discussion about Polaris, I thought you might find a couple of photos I took back in 2002 that shows you that the earth's spin axis is close to, but not precisely at Alpha UMi. Take a look at http://www.pbase.com/tomcat/aurora. The right-hand picture (http://www.pbase.com/tomcat/image/5186538)shows how the stars move over about 4 hours. The star nearest the center of the arcs is Polaris; if it was precisely at the pole, then the arc would have been a point.
You may also find the animated GIF photos of a (relatively) rare low-latitude (Maryland) Aurora interesting.
73 & Happy New Year -- Tom _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb