What Was the Implication of the Observation by Edwin Hubble

question 433

Multiple Choice

What was the implication of the observation by Edwin Hubble that the Cepheid variable stars he measured in the Andromeda "nebula" appeared to be very faint compared with what was expected?

• A) The observed period was affected by the intense gravitational field of the "nebula" as predicted by general relativity, leading to incorrect luminosity determination.
• B) The Andromeda "nebula" was very far away and was in fact a galaxy.
• C) Hubble had discovered a new class of intrinsically faint Cepheid variable stars.
• D) Dust and gas in the "nebula" had severely reduced the light from these stars.

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Definitions:

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Elements that are designed to be seen, such as photographs, charts, and diagrams, used to communicate information or ideas.

Primary Aspects

Fundamental elements or characteristics that are central to understanding or analyzing a subject or issue.

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A type of graph that represents quantified values as areas under a line, often used to track changes over time.

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