The Essential Cosmic Perspective (7th Edition) - Standalone book
The Essential Cosmic Perspective (7th Edition) - Standalone book
7th Edition
ISBN: 9780321928085
Author: Jeffrey O Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 1, Problem 19EAP

Decide whether the statement makes sense (or is clearly true) or does not make sense (or is clearly false). Explain clearly, not all of these have definitive answers, so your explanation is more important than your chosen answer.

20. The observable universe ¡s the same size today as it was a few billion years ago.

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Answer each of the following questions to the best of your ability in your own words. Be as specific and detailed as possible. 1. Describe each of the following terms: galaxy solar system universe Describe any relationships that may exist among any of these three things 2. Briefly explain the Big Bang theory
Question A7 State three pieces of evidence that support the idea that the Universe began in a hot Big Bang, and explain how each piece of evidence supports the hot Big Bang model. Describe the ob- servational evidence that supports the idea that the Universe is pervaded by Dark Energy, and explain why each piece of evidence you cite supports the Dark Energy model.
Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case,   A. Galaxy 1 must be twice as big as Galaxy 2.   B. we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than Galaxy 2.   C. we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2.   D. Galaxy 2 must be twice as old as Galaxy 1.

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The Essential Cosmic Perspective (7th Edition) - Standalone book

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