Why are the 'Fixed Stars' so FIXED?

"Henri Wilson" HW@.... wrote in message
...
On Wed, 28 Mar 2007 00:40:56 +0100, OG wrote:

Androcles wrote:

Here's a real fluke, look, a huff-puff star just happens to have a
Keplerian
orbit, found from it's velocity curve:
http://www.androcles01.pwp.blueyonde.../Analemmae.htm

What a strange coincidence, eh?
Perhaps the data was faked to make it look like a Keplerian orbit.

No, you just don't seem to understand that the velocity measured is
nothing to do with movement of the star as a whole for Cepheids.

You don't seem to have the faintest idea of what we're talking about...not
that
Androcles does either.

Whether or not cepheids are really huff-puff stars doesn't matter. We say
their
brightness variations are due to c+v effects caused by their surfaces
moving in
and out..

That seems a very peculiar thing to believe, given that we know that all the
light we see at any time in the cycle has the same speed.