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From: ccs009@ucdavis.UUCP (it)
Newsgroups: net.astro
Subject: Re: StarDate: June 29 The Birthday of Angelo Secchi
Message-ID: <443@ucdavis.UUCP>
Date: Thu, 15-Aug-85 15:55:52 EDT
Article-I.D.: ucdavis.443
Posted: Thu Aug 15 15:55:52 1985
Date-Received: Sun, 18-Aug-85 02:16:02 EDT
References: <293@utastro.UUCP>
Organization: University of California, Davis
Lines: 17

> A star's light can reveal what the star is made of.  More -- after
> this.
> 
> June 29  The Birthday of Angelo Secchi
> 
> A star's spectrum is just starlight separated into a continuous rainbow
                                                       ^^^^^^^^^^ 
> band of colors.  Dark lines appear at certain locations on the band --

	If a spectrum has absorption lines then it is not a continuous
spectrum but an absorption spectrum(not to be confused with emission
spectra which are a completely different animal).

> revealing the chemical composition of that particular star.  So -- a
> star's spectrum is its own personal fingerprint.  No two spectra are
> exactly alike.
>