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Re: analemma #87718
11/18/03 02:11 AM
11/18/03 02:11 AM
Joined: Mar 2000
Posts: 11,613
Louisville, Kentucky
Jackie Offline
Carpal Tunnel
Jackie  Offline
Carpal Tunnel
Joined: Mar 2000
Posts: 11,613
Louisville, Kentucky
the Equation-of-Time. Oh, this is SO cool! Thanks, you-all! The tilt of the earth, and also the elliptical orbit. Neat!


Re: analemma #87719
11/19/03 10:55 PM
11/19/03 10:55 PM
Joined: Jan 2001
Posts: 13,858
W
wwh Offline OP
Carpal Tunnel
wwh  Offline OP
Carpal Tunnel
W
Joined: Jan 2001
Posts: 13,858
I've got it! One of the few things I remember from calculus over sixty years ago is: "Always examine the means and the extremes."
Suppose the earth's orbit were a perfect circle, and you were able to turn the sun into a huge stroboscope, that flashed only once in twenty four hours, and had it synch'd so the blip hit on the Greenwich meridian vertically.
If you could instantly on Jan 1 turn earth's orbit into an ellipse that shortened earth's distance from the sun, the blip would arrive early.
Isn't that easy to understand?


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