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If it is actually a member of the Scorpius-Centaurus group, as we have strong reason to believe, it is fully 350 light-years from the earth, and its diameter is about 400,000,000 miles. Diameters of the Sun, Arcturus, Betelgeuse, and Antares compared with the orbit of Mars. Sun, diameter, 865,000 miles. Arcturus, diameter, 21,000,000 miles. Betelgeuse, diameter, 215,000,000 miles.
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