Hugo Mills <[EMAIL PROTECTED]> writes: > On Fri, Mar 04, 2005 at 10:37:17AM -0500, Lennart Sorensen wrote: >> On Fri, Mar 04, 2005 at 10:24:30AM +0100, Martin Dickopp wrote: >> > Both of you are joking, I take it. But just in case someone is tempted >> > to take this suggestion serious: The sun position does *not* peak at >> > 12:00 "winter time" or 13:00 summer time. The deviation can be an hour >> > or more, and furthermore it changes every day. >> >> The sun does peak the same time every day, but it's only at noon exactly >> if you are in the right place on the planet (for your time zone). If >> you are east or west of that the time will be off a bit, but it will >> still be the same every day. > > Actually, that's not true. It varies quite a bit, as Martin > said. Take a look at the Equation of Time[1]. The variation isn't > anything like as much as the hour that Martin said -- it's about +/- > 15 minutes over the year.
Just for the record, I didn't say that the equation of time is up to one hour, but that the discrepancy between 12:00 (or 13:00 summer time) and the peak position of the sun can be one hour or more. This discrepancy is mostly due to the constant difference between local time (i.e. /mean/ solar time) and zone time. Martin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
