Unformatted text preview: Chapter 2, Problem #45: .044 arcsecond dist 427 ly .044 x 60 X 60 = 158.4 degrees 10 tril km in 1 light year 10 tril x 427 = 4.27 x 10^16 km 158.4 degrees x 2 Pi x 4.27 x 10^16 km = 1.8 x 10^17 km 360 degrees Betelgeuse is 1.8 x 10^17 km in diameter....
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This note was uploaded on 02/08/2011 for the course ASTR 100 taught by Professor Hayesgehrke during the Spring '06 term at Maryland.
 Spring '06
 HayesGehrke

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