Fairy tales for adults

Richard Lightman richard at nezumi.plus.com
Wed Feb 12 11:56:49 PST 2003


* Steve Bougerolle <steveb at creek-and-cowley.com> [2003-02-12 19:08]:
> 
> Typically we measure the redshift of the star, by fairly reliable means
> such as measuring the shift of spectral lines.  This gives us a
> velocity, and is fairly un-controversial.  The next step is to convert
> that velocity to a distance, which necessarily involves using some model
> or other.
> 
You are a bit out of date - astronomy has gone a long way in the last
few decades.


Richard
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