4. Compute the angular diameter of Betelgeuse as seen from the Earth. Given that My= -5.5 mag, mv= 0.8 mag, and R= 650R0. [Hint: 0 = s/r, where 0 is the angular diameter in radians, s is the arc length, and ris the radius. Express your answer in arcseconds.]
4. Compute the angular diameter of Betelgeuse as seen from the Earth. Given that My= -5.5 mag, mv= 0.8 mag, and R= 650R0. [Hint: 0 = s/r, where 0 is the angular diameter in radians, s is the arc length, and ris the radius. Express your answer in arcseconds.]
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