varying speed?

2011-03-24 Thread Brent
Hello again; I read this at: http://www.sundialsoc.org.uk/HDSW.htm Part 17 >When we look at the Sun we are observing it from a moving >platform. It is the varying speed around its elliptical >orbit and the tilted axis which are responsible for the >daily variations accounted for by the Equation

RE: varying speed? [SEC=UNCLASSIFIED]

2011-03-24 Thread Hank de Wit
Hi Brent, Indeed it does change Brent. The Earth's orbit is slightly elliptical with the Sun at one of the foci of the ellipse, which means during part of it's orbit the Earth is closer to the Sun than 6 months later. Due to conservation of momentum (remember the ice-skater pulling their arms i

RE: varying speed? [SEC=UNCLASSIFIED]

2011-03-24 Thread Hank de Wit
I meant "angular momentum", not just momentum. Sorry. -Original Message- From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Hank de Wit Sent: Friday, 25 March 2011 11:23 To: Sundial List Subject: RE: varying speed? [SEC=UNCLASSIFIED] Hi Brent, Indeed i