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| 1 | |
What are the ways in which clusters of galaxies can be classified? |
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| 2 | |
What evidence do we have that there is more dark matter than luminous matter in the Local Group of galaxies? |
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| 3 | |
Explain why the Virgo cluster is considered a "poor" cluster even though it contains at least one thousand galaxies. |
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| 4 | |
Compare the Virgo and Coma clusters with respect to distance, richness, and the types of galaxies found in their central regions. |
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| 5 | |
Why is there a lower proportion of spiral galaxies in dense clusters than in clusters with lower density? |
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| 6 | |
In what fundamental way are the pancake model and the hierarchical clustering model for the formation of clusters of galaxies different? |
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| 7 | |
What is the best way to detect extremely hot gas in clusters of galaxies? |
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| 8 | |
What have astronomers been able to learn about dark matter in clusters of galaxies by studying the gravitational lensing of distant galaxies by clusters of galaxies? |
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| 9 | |
What is the relationship between clusters of galaxies and superclusters? |
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| 10 | |
Describe the structure of space on a scale that includes superclusters and voids. |
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