Astr100HW1

Astr100HW1 - Chapter 2, Problem #45: .044 arcsecond dist...

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Julie Gilbert Tuesday February 12, 2008 ASTR100 Homework Chapter 1, Problem #45: Alpha Centauri= 4.4 light years away 10 trillion km in 1 light year 4.4 x 10 trillion = 4,400,000.000,000,000 4.4 X 10^14 Time= Distance/Speed 100 y= 4.4 x 10^14 km/Speed 4.4 x 10^14 km 100 yr = 4.4 x 10^12 km/hr You would have to go 4.4 x10^12 km/hr to reach Alpha Centauri in 100 years.
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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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