The Method Used by Hubble to Determine the Distance to the Andromeda

question 73

Multiple Choice

The method used by Hubble to determine the distance to the Andromeda Galaxy (M31) ,thereby establishing the concept of separate and individual galaxies throughout the universe,was the

• A) measurement of the redshift of the whole galaxy.
• B) observation of the apparent brightness of supernovas in M31.
• C) measurement of stellar parallax,or apparent motion of stars because of Earth's orbital motion.
• D) observation of Cepheid variable stars.

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