EOT
I’m trying to understand the equation of time All diagrams that I have seen (like the attached) are only two dimensional. For the sake of simplicity, the earth tilt is ignored. According to a two dimensional drawing, it will always require more than a 360 degree revolution for a point on the earth to face the sun again. However the earth is tilted. Does this mean that sometimes it takes more than 360 to make a revolution and sometimes it takes less? Or does this mean that it always takes more than a 360 degree revolution. However because of the tilt, the additional spin required to face the sun again is greater on some days than on others. I think its the later answer but I'm not sure. -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! <>--- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Terminator
hi Doug Try www.daylightmap.com/ as an alternative regards Ian Maddocks Chester, UK -- From: "Douglas Bateman" Sent: Wednesday, September 14, 2011 10:25 PM To: "Sundial" Subject: Terminator Does anyone know of a link or an "app" that shows the terminator in graphic form over the world. I used to use a 'mapmaker' website but that seems to have disappeared. I have foundwww.worldtimezone.com/datetime12.php andhttp://24timezones.com/ but neither are as clear or as uncluttered and the site of a few years ago. The terminator has this fascinating shape as we approach the equinox. Regards, Doug --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
