Astronomy current events question: titanium oxide in exoplanet WASP-19

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!)

Elyar Sedaghati, Henri Boffin, and Richard Hook, "ESO's VLT Makes First Detection of Titanium Oxide in an Exoplanet" (September 13, 2017)
eso.org/public/news/eso1729/

The European Southern Observatory's Very Large Telescope discovered various chemical compounds in exoplanet WASP-19b by analyzing:
(A) its orbiting moons.
(B) its cloud pattern colors.
(C) light passing through its atmosphere.
(D) how much heat it emits.
(E) radio emission from molecules.

Correct answer: (C)

Student responses
Sections 70178, 70186
(A) : 0 students
(B) : 5 students
(C) : 23 students
(D) : 14 students
(E) : 6 students