Astronomy current events question: star travel through Milky Way galaxy

Astronomy 210L, fall semester 2015
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!)

Minerva Baumann, "Stellar Discovery: NMSU Researchers Co-author Study Revealing Stars in Galaxy Have Moved" (July 30, 2015)
newscenter.nmsu.edu/Articles/view/11291/stellar-discovery-nmsu-researchers-co-author-study-revealing-stars-in-galaxy-have-moved

The Sloan Digital Sky Survey (SDSS) telescope analyzed the __________ of stars to track where they were born in the Milky Way galaxy.
(A) planetary systems.
(B) chemical composition.
(C) binary companions.
(D) Doppler shifts.
(E) dark matter.

Correct answer: (B)

Student responses
Sections 70178, 70186
(A) : 0 students
(B) : 25 students
(C) : 2 students
(D) : 7 student
(E) : 2 students