Astronomy current events question: close binary PDS 27 and PDS 37

Astronomy 210L, spring semester 2019
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!)

News release, "Massive Twin Star Snuggles Close to Its Stellar Sibling" (March 11, 2019)
leeds.ac.uk/news/article/4379/massive_twin_star_snuggles_close_to_its_stellar_sibling

PDS 27 and PDS 37 are the closest young stars to be discovered, using high resolution images obtained from:
(A) lookback time.
(B) laser range finders.
(C) the International Space Station.
(D) underground neutrino detectors.
(E) combining light from several telescopes.

Correct answer: (E)

Student responses
Sections 30679, 30680
(A) : 0 students
(B) : 3 students
(C) : 7 students
(D) : 0 students
(E) : 29 students