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Yes, you can see SOME comets in both the morning and evening. Remember,
not all comets orbit along the same plane that the planets do.
Imagine a VERY long pole extends outward along the rotation axis of the
sun - maybe about 10 sun diameters long. Place a flag on the pole on the
end that comes out of the sun's north pole. You will be able to see that
flag both in the morning and the evening because the long pole is
perpendicular to the path that the sun travels through the sky.
Bob at PC
-----Original Message-----ISON in
From: Phys-l [mailto:phys-l-bounces@phys-l.org] On Behalf Of Bruce
Sherwood
Sent: Thursday, November 14, 2013 1:47 PM
To: Phys-L@Phys-L.org
Cc: njaapt@mail.aapt.org
Subject: Re: [Phys-L] [SPAM] Re: Comet ISON
The latest issue of Sky & Telescope has diagrams of the situation for
December, and the predictions are all about seeing things just beforedawn,
but their last image is for Dec. 5. The earthsky.org site shows anevening
scene for Dec. 18, which might well be correct -- it would be after thecomet
has gone around the Sun, if it makes it around the Sun. What isabsolutely
certain is that you can't possibly see the comet both just beforesunrise and
just after sunset, on the same day.
Bruce
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