Use the Graph Above Showing Data for the Brightest Galaxies

question 43

Multiple Choice

Use the graph above showing data for the brightest galaxies in clusters of galaxies to answer the following question. If new studies show that the exceptions are a class of galaxies with extraordinarily bright centers, which conclusion is NOT justified based on the plot and the findings of these new studies?

• A) Bright nuclei are caused by supermassive black holes surrounded by hot gas.
• B) Galaxies appear redder the farther away they are.
• C) Bright nuclei are more common in cluster galaxies that are farther away.
• D) Bright nuclei were more common long ago, since the light from more distant galaxies has been traveling much longer.

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