We can determine the amount of mass in a cluster of galaxies by observing its gravitational interactions.How much of this mass is luminous matter?
A) 1-2%
B) 10-20%
C) 50%
D) 80-90%

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The Answer of We can determine the amount of mass in a cluster of galaxies by observing its gravitational interactions.How much of this mass is luminous matter?
A) 1-2%
B) 10-20%
C) 50%
D) 80-90%

We Can Determine the Amount of Mass in a Cluster