Astronomy current events question: "jellyfish" galaxy tail formation

Astronomy 210L, fall semester 2017
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!)
Alessandra Potenza, "How the Tentacles of Jellyfish Galaxies Feed Supermassive Black Holes" (August 17, 2017)
Observations of several "jellyfish" galaxies indicate that they may be feeding their central black holes with their own long tails of:
(A) ejected gas.
(B) antimatter.
(C) gravitational waves.
(D) magnetic field lines.
(E) dark matter.

Correct answer: (A)

Student responses
Sections 70178, 70186
(A) : 36 students
(B) : 5 students
(C) : 4 students
(D) : 1 student
(E) : 5 students

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