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Unformatted text preview: Brock University Test 1, October 2008 Number of pages: 9 Course: ASTR 1P01 Number of Students: 500 Date of Examination: October 9, 2008 Number of hours: 50 min Time of Examination: 4:00–4:50 Instructor: B.Mitrovi´ c 1. The cluster of galaxies to which Milky Way belongs is called (a) Andromeda. (b) Magellanic Cloud. (c) Local Group. (d) Global Group. 2. The average distance between the Earth and the Sun is about (a) 1.5 million km. (b) 15 million km. (c) 150 million km. (d) 1.5 billion km. 3. It takes light about to travel the distance between the Sun and the Earth. (a) 1.25 seconds (b) 8 seconds (c) 1.25 minutes (d) 8 minutes 4. The Earth rotates as seen from far above the Earth’s North Pole. (a) from east to west (westward) (b) from west to east (eastward) 5. The diameter of our galaxy is about (a) 1,000 ly (light years). (b) 10,000 ly (light years). (c) 100,000 ly (light years). (d) 1,000,000 ly (light years). 6. All the stars in the “Big Dipper” are at the same distance from us. (a) True. (b) False. 1 Course: ASTR1P01 Date: October 9, 2008 page 2 of 9 pages 7. How long does it take the Sun to complete one round-trip around galactic centre? (a) 2.3 million years. (b) 23 million years. (c) 230 million years. (d) 2.3 billion years . 8. A light year is (a) the distance light travels in one year. (b) the time it takes light to travel to the closest star. (c) the time it takes light to travel 1 AU. (d) [None of the above.] 9. In their daily motions the Sun and the stars move (a) parallel to celestial equator. (b) parallel to the ecliptic. (c) parallel to celestial horizon....
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- Spring '08