Astronomy current events question: Cassini sampling interstellar dust

Astronomy 210L, spring 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!)

Emily Baldwin, "Saturn Spacecraft Samples Interstellar Dust" (April 14, 2016)
nasa.gov/feature/jpl/saturn-spacecraft-samples-interstellar-dust

NASA's Cassini spacecraft collected dust grains that originated from outside the solar system, as determined from their:
(A) speed and trajectory.
(B) radioactivity.
(C) neutrino emissions.
(D) lack of organic compounds.
(E) electrostatic charge.

Correct answer: (A)

Student responses
Sections 30678, 30679, 30680
(A) : 9 students
(B) : 3 students
(C) : 6 students
(D) : 6 students
(E) : 3 students