Astronomy current events question: Alpha Centauri B Earth-mass extrasolar planet

Astronomy 210L, fall semester 2012
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!)
Xavier Dumusque et al., "Planet Found in Nearest Star System to Earth," October 16, 2012
The European Southern Observatory's La Silla Observatory in Chile discovered an Earth-mass planet by observing __________ the nearby star Alpha Centauri B.
(A) reflected light from.
(B) its gravitational pull on.
(C) the eclipses of.
(D) the parallax of.
(E) a dusty disk surrounding.

Correct answer: (B)

Student responses
Sections 70178, 70186, 70200
(A) : 10 students
(B) : 30 students
(C) : 8 students
(D) : 5 students
(E) : 3 students

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