Astronomy current events question: gravitational lensing of distant galaxy

Astronomy 210L, fall semester 2014
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!)
J.D. Harrington, Donna Weaver, and Ray Villard, "Hubble Shows Farthest Lensing Galaxy Yields Clues to Early Universe," July 31, 2014
NASA's Hubble Space Telescope observed the most distant galaxy that uses __________ to magnify even more distant objects beyond it.
(A) gravitational forces.
(B) magnetic fields.
(C) lookback time.
(D) dark energy.
(E) Doppler redshifts.

Correct answer: (A)

Student responses
Sections 70178, 70186
(A) : 12 students
(B) : 12 students
(C) : 3 students
(D) : 5 students
(E) : 6 students

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