Absorption lines are unaffected by Doppler shift.

Androcles wrote:
Assistant Professor "Paul B. Andersen" of :
Agder University College (HiA)
Serviceboks 422, N-4604 Kristiansand, NORWAY Tel (+47) 38 14 10 00 Fax
(+47) 38 14 10 01
has executed the biggest fumble ever seen in the history of
sci.physics.relativity
in message
...

"The spectral class [of stars] is determined by the relative positions
and intensities
of the absorption lines, and these are unaffected by a Doppler shift."

I think he means only their 'absolute' positions will be affected? The
'relative' positions and intensities of the absorption lines will be
unaffected?

has.mac