Why Are Some Galaxies' Spectra Blueshifted Rather Than Redshifted

question 14

Multiple Choice

Why are some galaxies' spectra blueshifted rather than redshifted?

• A) Some distant galaxies are gravitationally lensed.
• B) Some nearby galaxies are attracted to us because of the mass of the Milky Way.
• C) Some nearby galaxies have vigorous star formation and are much bluer than others.
• D) Some distant galaxies have an AGN at their centers.

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Definitions:

Milgram Experiment

A psychological experiment conducted by Stanley Milgram in the 1960s to study obedience to authority, where participants were instructed to administer electric shocks to another person.

Stanford University Prison Experiment

A psychological study conducted by Philip Zimbardo in 1971 at Stanford University, where students were assigned roles of prisoners and guards to explore the effects of perceived power.

Generalization

Drawing a conclusion about a certain characteristic of a population based on a sample from it.

Logical Support

The provision of reasons or evidence to justify a claim or argument.