With Enormous Effort, a Team of Astronomers Manages to Collect

Multiple Choice

With enormous effort, a team of astronomers manages to collect enough light from a galaxy far, far away to produce a spectrum. That spectrum has lines from the elements carbon, silicon, and sulfur. This tells the team that

A) the galaxy must be closer to us than 1 billion light years
B) the galaxy must contain a quasar
C) the galaxy must have had an entire generation of stars that was born, lived, and died
D) the galaxy must be a massive elliptical galaxy
E) what they are seeing is not a galaxy at all, but the remnant of one supernova