Astronomy current events question: dwarf planet candidate 2015 RR245

Astronomy 210L, fall semester 2016
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!)
Kenneth Chang, "Astronomers Discover New Likely Dwarf Planet, the Latest of Many" (July 13, 2016)
The size of dwarf planet candidate 2015 RR245 was estimated from measurements of its _________ by the Canada-France-Hawaii Telescope.
(A) gravitational pull on Pluto.
(B) rotation rate.
(C) brightness and distance.
(D) orbiting moons.
(E) cryovolcanic activity.

Correct answer: (C)

Student responses
Sections 70178, 70186
(A) : 5 students
(B) : 5 students
(C) : 17 students
(D) : 1 student
(E) : 2 students

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