Which of the following can we NOT learn from studying the Doppler shifts in the spectrum of galaxies beyond our Local Group?
A) whether they have Jupiter-mass planets around many of their stars
B) their red shifts
C) their rotation speeds
D) their masses
E) their distances

Question

Quizplus · Accepted Answer

Studying Doppler shifts in the spectrum of galaxies can tell us about their red shifts, rotation speeds, masses, and distances, but it cannot reveal whether they have Jupiter-mass planets around their stars. This requires different methods, such as direct imaging or gravitational microlensing.

Which of the Following Can We NOT Learn from Studying