Astronomy current events question: Andromeda Galaxy stellar populations

Astronomy 210L, spring semester 2015
Cuesta College, San Luis Obispo, CA

Students are assigned to read online articles on current astronomy events, and take a short current events quiz during the first 10 minutes of lab. (This motivates students to show up promptly to lab, as the time cut-off for the quiz is strictly enforced!)
Tim Stephens, "Study of Andromeda's Stellar Disk Indicates More Violent History than Milky Way," (January 8, 2015)
The Andromeda galaxy may have merged with several smaller galaxies in the past, based on analyzing data from the Keck Observatory and Hubble Space Telescope of its:
(A) central supermassive black hole.
(B) look-back time.
(C) dark matter halo.
(D) gravitational pull.
(E) star velocities and ages.

Correct answer: (E)

Student responses
Sections 30678, 30679, 30680
(A) : 5 students
(B) : 3 students
(C) : 4 students
(D) : 14 students
(E) : 34 students

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