Answered: 9. Redshift of light from many galaxies…

9. Redshift of light from many galaxies was first observed in the 1920s. What was the significance of that? 10. Why is the temperature of cosmic background radiation important to the Big Bang theory?

Horizons: Exploring the Universe (MindTap Course List)

14th Edition

ISBN:9781305960961

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter14: Modern Cosmology

Section: Chapter Questions

Problem 4RQ

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.

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9. Redshift of light from many galaxies was first observed in the 1920s. What was the significance of that?
10. Why is the temperature of cosmic background radiation important to the Big Bang theory?

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5. Cesar reads about the big bang theory, which explains that the universe expanded as theresult of an explosion. He wants to evaluate whether this theory is a good one. Whichstatement is a characteristic of a good theory? A. It is the idea of only one scientist.B. It does not change as time passes.C. It is not supported by scientific evidence.D. It changes with new observations made by astronomers.
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