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Exam 1a Solutions-1 - Astronomy 103 Section 9am 11am Exam 1...

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Astronomy 103 Exam 1 version A Spring 2008 Section: 9am 11am Name __ SOLUTIONS __________________ Instructions: Print your name on both the exam paper and the scantron. Print you student id on the scantron. Print the test version on the upper right corner of the scantron. Circle the correct lecture time on the exam paper. Also write it on the scantron. answer the questions on both the exam paper and the scantron. “What you own is your own kingdom What you do is your own glory What you love is your own power What you live is your own story In your head is the answer Let it guide you along Let your heart be the anchor And the beat of your own song” – Rush Multiple Choice 1. The average distance from Earth to the sun is a. 1 ly b. 1 million km c. 1 million miles d. 1 billion km * e. 1 AU 2. The sun is * 3. 16.5 billion is the same as 4. If light takes 8 minutes to reach Earth from the sun and 1.3 hours to travel from the sun to Saturn, what is the distance from the sun to Saturn?
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5. In the diagram at the right, what is the diameter of Jupiter? a. about 7.0×10 4 km b. about 7.0×10 5 km c. about 1.4×10 4 km * d. about 1.4×10 5 km e. about 3.5×10 6 km 6. If the distance to the nearest star is 4.2 light-years, then a. the star is 4.2 million AU away. * b. the light we see left the star 4.2 years ago. c. the star must have formed 4.2 billion years ago. d. the star must be very young. e. the star must be very old. 7. Seen from the northern latitudes, the star Polaris west. *
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