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Re: Solar Motion



I have simulated the solar system in my orbit simulator program and found
that the velocity of the sun relative to the center of mass varies between
approximately 9 and 16 m/s. The velocity difference along the line of sight
would be less.

Tore Ottinsen
Hellerud high school,
Oslo, Norway
http://www.ottisoft.com
Orbit Xplorer - The educational orbit simulator



I'm playing around with another idea that probably has been thought of
before, so I thought I'd do a bit of pre-math research...

The "simple" problem: Can we prove that there are other planets in our
solar system using the Doppler Shift of the sun as seen from earth?

The probably-not-simple approach: Work out a 3-to-9 body CoM problem, with
the twitch of a rotating frame of reference so the CoM of the system is
stably viewed. The sun should appear to "wobble" a bit about
that point due
to the gravitational influences of the planets, and if we take the head-on
wobbling portion, that should give us doppler-shifted lines (admittedly of
very small order) that we could observe to confirm the existence
of planets.

Gordon P. Smith