Suppose That Astronomers Discover an Error in Our Understanding of Cepheid

question 4

Multiple Choice

Suppose that astronomers discover an error in our understanding of Cepheid variable stars,such that stars of a given oscillation period have a smaller luminosity than previously assumed.How would that change the estimated distances to other galaxies?

• A) The distance estimates would not change.
• B) The distance estimates would have greater variation.
• C) The distance estimates would become larger.
• D) The distance estimates would become smaller.

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