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Re: NIF: Kepler problem, part I (fwd)

On Sat, 4 May 1996, A. R. Marlow wrote:

...
Sorry to bring up a difficulty at this late date, but I simply didn't
notice it before, and it may just be a typo -- do you mean this
force depends on what choice you make for a coordinate ORIGIN, or is it
dependent only on separation between the two masses? Specifying a
reference frame in which Earth and Sun are at rest singles out no
origin, so I presume you mean something else.

Another way of saying this is that making things dependent on an origin
choice is the same as introducing three adjustable parameters.

A. R. Marlow E-MAIL: marlow@beta.loyno.edu
Department of Physics PHONE: (504) 865 3647 (Office)
Loyola University 865 2245 (Home)
New Orleans, LA 70118 FAX: (504) 865 2453