Astronomy quiz question: globular star clusters

Astronomy 210 Quiz 6, Fall Semester 2010
Cuesta College, San Luis Obispo, CA

The locations of globular star clusters provide evidence for:
(A) the location of the Milky Way's center.
(B) dark matter in the halo.
(C) self-sustaining star formation.
(D) the spiral arm structure of the Milky Way.

Correct answer: (A)

Globular star clusters can be easily seen above and below the disk of the Milky Way, unimpeded by interstellar gas and dust within the disk of the Milky Way, and their locations are centered on the gravitational center of the Milky Way.

Section 70158
(A) : 22 students
(B) : 5 students
(C) : 2 students
(D) : 16 students

"Success level": 54% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.73

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