The Amount of Visible Matter in a Typical Cluster of Galaxies

question 188

Multiple Choice

The amount of visible matter in a typical cluster of galaxies is

• A) just sufficient to hold the inner regions of the cluster together, but the fringe galaxies are drifting away from this center.
• B) not sufficient to hold the cluster together by a factor of 2, such that the cluster is slowly spreading out.
• C) insufficient to hold the cluster together, by about a factor of 10.
• D) far more than enough to hold the cluster together gravitationally and is slowly concentrating the cluster into a very tight supercluster.

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Definitions:

Profit Center

A part of a company that directly contributes to its profit through its operations and management.

Direct Expense

Costs that can be directly attributed to the production of goods or services, such as raw materials or labor.

Cost Center

A division or department within a business to which costs can be allocated for accounting and budgeting purposes.

Indirect Expense

Costs not directly traceable to a specific cost object, such as overhead or administrative expenses, which support the operation of the business as a whole.