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- Scientific astronomy infographic comparing three main stars of The Winter Triangle which consists of Sirius A, Betelgeuse, and Procyon A with spectral type and class, surface temperature, mass, radius, and luminosity data. Mouse Pad #858341342
Scientific astronomy infographic comparing three main stars of The Winter Triangle which consists of Sirius A, Betelgeuse, and Procyon A with spectral type and class, surface temperature, mass, radius, and luminosity data. Mouse Pad #858341342