Multiple Choice
Which of the following methods used to determine the mass of a cluster of galaxies does not depend on Newton's law of gravity?
A) measuring the amount of distortion caused by a gravitational lens
B) measuring the temperature of X- ray gas in the intracluster medium
C) measuring the orbital velocities of galaxies in the cluster
D) none of the above
Correct Answer:
Verified
Correct Answer:
Verified
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