Astronomy current events question: possible atmospheric water vapor on exoplanet K2-18b

Astronomy 210L, fall 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!)

Claire Andreoli, "NASA’s Hubble Finds Water Vapor on Habitable-Zone Exoplanet for 1st Time" (September 11, 2019)
nasa.gov/feature/goddard/2019/nasa-s-hubble-finds-water-vapor-on-habitable-zone-exoplanet-for-1st-time

Analysis of starlight filtered through the atmosphere of exoplanet K2-18b indicate it may have __________ clouds and rain.
(A) chlorophyll.
(B) water vapor.
(C) iron magma.
(D) sulfur dioxide.
(E) carbon monoxide.

Correct answer: (B)

Student responses
Sections 70178, 70186
(A) : 0 students
(B) : 32 students
(C) : 0 students
(D) : 0 students
(E) : 1 student