Astronomy current events question: brown dwarf WD 0806-661 B

Astronomy 210L, fall semester 2011
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!)

Alasdair Wilkins, "Tiny Failed Star Is The Coldest Object We’ve Ever Photographed," October 19, 2011
http://io9.com/5851486/tiny-failed-star-is-the-coldest-object-weve-ever-photographed

NASA's Spitzer space telescope imaged the brown dwarf WD 0806-661 B, which is notable for being the __________ detected so far.
(A) coldest star-like object.
(B) lowest-mass star.
(C) most radioactive star.
(D) farthest planet.
(E) most Earth-like planet.

Correct answer: (A)

Student responses
Sections 70178, 70186, 70200
(A) : 22 students
(B) : 1 student
(C) : 0 students
(D) : 2 students
(E) : 1 student