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A Tale of Two Stars
Here are basic spectra from two familiar stars in the night sky. Vega's spectra is on the left and basically has weak spectral lines based mostly on the Hydrogen Balmer series. This is indicative of a fairly young, hot star. Betelgeuse's spectra is far more complex. We can see spectral lines for Barium, Calcium, Iron and Magnesium and compounds like Vandium Oxide and Titanium Oxide indicative of a star near the end of its life. Data collected with amateur equipment and processed through RSpec software.
M95_2012_03_22_6SCT_16IC_32min_SN2012aw.jpg 2012_06_05_Venus_Transit_SV80_Cak_decon_-_Copy.jpg Vega_Betelgeuse_spectra.jpg Mars_2012_02_18_C6_f25.jpg 2011_12_27_AR1384_prom_PST.jpg
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