How Do Astronomers Create Three- Dimensional Maps of the Universe

question 97

Multiple Choice

How do astronomers create three- dimensional maps of the universe?

• A)by interpreting the peculiar velocities of each galaxy
• B)by using a galaxy's position on the sky and its redshift to determine its distance along the line of sight
• C)through the comparison of computer models of galaxy formation with observations
• D)by carefully measuring the parallax of each galaxy
• E)by using a galaxy's position on the sky and its brightness as a measure of distance along the line of sight

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