To Map Out How Clusters of Galaxies Are Distributed in the Universe

question 24

Multiple Choice

To map out how clusters of galaxies are distributed in the universe, astronomers needed to know where each cluster was in the sky AND

• A) how many galaxies were in each cluster
• B) how blue or red the galaxies in each cluster were
• C) how far away from us each cluster was
• D) whether any of the galaxies in each cluster acted like quasars
• E) whether any gravitational lensing could be seen in each cluster

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Definitions:

Rational Economics

The study of how individuals and groups make decisions to allocate resources in order to maximize their welfare.

Utility Maximization

An economic principle that suggests individuals seek to achieve the highest level of satisfaction or utility from their actions and decisions.

Needs and Wants

The basic requirements for survival, such as food and shelter, compared to desires or wishes that do not necessarily contribute to one’s survival.

World Trade Organization

An international organization that regulates and facilitates international trade between nations.