Astronomy current events question: oldest known Milky Way stars

Astronomy 210L, fall 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!)
Charles Q. Choi, "These Ancient Stars May Be the Oldest Ever Seen in the Milky Way" (November 11, 2015)
The Australia National University's SkyMapper telescope discovered the oldest known stars in the Milky Way, based on their:
(A) lack of metals.
(B) erratic orbits.
(C) type II supernova explosions.
(D) gravitational redshifts.
(E) dark matter content.

Correct answer: (A)

Student responses
Sections 70178, 70186
(A) : 13 students
(B) : 1 student
(C) : 4 students
(D) : 3 students
(E) : 1 student

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