By Examining Rich Clusters of Galaxies, Such as the Coma

question 3

Multiple Choice

By examining rich clusters of galaxies, such as the Coma Clusters, astronomers have discovered that spiral galaxies

• A) grow to be very large and bright at the centers of these clusters
• B) turn out to be most of the galaxies in such clusters, and many are found throughout each cluster
• C) do not exist at all in such clusters
• D) are found mostly in the outer regions of such clusters, not in the middle
• E) are all tilted exactly the same way in such cluster; all their disks are fully aligned

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