Chapters 12 The Milky Way Galaxy Quiz

Chapters 12 The Milky Way Galaxy Quiz - Astronomy 101:...

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1. Who discovered that, when viewed through a telescope, the Milky Way is resolved into thousands of individual stars? a. Tycho Brahe b.Galileo Galilei c. Isaac Newton d. William Herschel e. Jacobus C. Kapteyn 2. What main conclusion did the Herschels draw from their star counts? a.The Milky Way is a disk of stars with the sun near the center. b.The center of the Milky Way is far away in the constellation Sagittarius. c. All stars have about the same luminosity. d. The sun's luminosity is much higher than that of the average star. e. The Milky Way extends out an infinite distance. 3. Which type of pulsating variable star is the most luminous? a.Long-period Cepheid variables. b.Medium-period Cepheid variables. c. Short-period Cepheid variables. d. RR Lyrae variables. e. All pulsating variables have the same average luminosity. 4. What feature of the Cepheid variables that were studied by Henrietta Leavitt in 1912 allowed her to conclude that the period-apparent brightness relation she observed was in fact a period- luminosity relation? a. The Cepheids that she observed were all the same average apparent magnitude. b.The Cepheids that she observed were all eclipsing binaries. c. The Cepheids that she observed were at the same distance. d. The Cepheids that she observed were all the same color. e. The Cepheids that she observed had the same period. 5. What type of stars are the Cepheid variables?
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This note was uploaded on 11/11/2011 for the course CH 101 taught by Professor Susanbontems during the Fall '11 term at Montgomery College.

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Chapters 12 The Milky Way Galaxy Quiz - Astronomy 101:...

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