51. According to the passage, in what way is (D) It is found in the space between
the Local Group typical of galactic clusters? galaxies.
(A) In its size 57. As used throughout the passage, the
word
(B) In the number of galaxies it contains members refers to
(C) In its shape (A) stars
(D) In the types of galaxies that make it up (B) galaxies
(C) scientists
(D) clusters
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