Astronomy current events question: atmosphere of exoplanet HR8799e

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!)

Sylvestre Lacour, Mathias Nowak, Paul Mollière, and Calum Turner, "GRAVITY Instrument Breaks New Ground in Exoplanet Imaging" (March 27, 2019)
eso.org/public/usa/news/eso1905/

Characteristics of exoplanet HR8799e's atmosphere were revealed 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) : 1 student
(B) : 1 student
(C) : 5 students
(D) : 2 students
(E) : 30 students