Tony Finch wrote:
On Mon, 22 Dec 2008, Rob Seaman wrote:
No. We have been using mean solar time formally since the 19th
century, and informally since we woke each morning to light shining
through
the entrance of the cave.
Apparent solar time is not mean solar time. Remember that for a lot of
history we used rubber hours that varied according to the time between
sunrise and sunset. Mean solar time cannot be established without
reasonably accurate clocks.
Either you haven't read this message yet:
http://six.pairlist.net/pipermail/leapsecs/2008-December/000714.html
or I've yet again failed to make my point.
Mother Earth "establishes" mean solar time simply by spinning on its
axis and orbiting the sun. Apparent solar time is a mere happenstance
of angles. Rates matter more than offsets.
Rob
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