Chapter 8 (The Family of Stars) Quiz

# Chapter 8 (The Family of Stars) Quiz - Astronomy 101:...

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Astronomy 101: Chapter 8: The Family of Stars 1. The parallax angle of a star and the lines of sight to that star from Earth are parts of a long, skinny triangle with a short side of: a. 1000 km. b. 1 Earth diameter. c. 1 AU. d. 2 AU. e. 40 AU. 2. What is the distance to a star that has a parallax angle of 0.5 arc seconds? a. 0.5 parsec b. 1 parsec c. 2 parsecs d. 5 parsecs e. 10 parsecs 3. Why can smaller parallax angles be measured by a telescope in Earth's orbit than by a telescope at Earth's surface? a. Telescopes orbiting Earth are closer to the stars. b. Earth's atmosphere severely limits a telescope's resolving power. c. Earth's atmosphere severely limits a telescope's light gathering power. d. Earth's atmosphere severely limits a telescope's magnifying power. e. They can be connected to Earth-based telescopes to do interferometry. 4. The distance to a star and its apparent magnitude can be combined to tell us the star's: a. age. b. mass. c. diameter. d. intrinsic brightness. e. surface temperature. 5. At what distance must a star be to have its apparent magnitude equal to its absolute magnitude? a. 1 AU b. 10 AUs c. 1 parsec d. 10 parsecs e. 1 megaparsec

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6. What is the luminosity of a star that has an absolute magnitude that is 5 magnitudes brighter
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## This note was uploaded on 11/08/2011 for the course AS 101 taught by Professor Biegel during the Fall '11 term at Montgomery College.

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Chapter 8 (The Family of Stars) Quiz - Astronomy 101:...

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