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Is there any practice aspect of this assignment or able to use scientific data available to the public.
HA will look at Hydrogen, OIII to oxygen and SII for sulphur but a more accurate method is to use Spectroscopic data from a star which will provide loads more elements in clouds. Absorption spectrum is used commonly for Nebula.
Unless you have a way of measuring this then the best way is to get data from scientific data already available to the public.
Take a look at the Radio/Spectrography section for more information. I don't know where i can get the data, but think someone else would be in a better position to tell.
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