21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
6th Edition
ISBN: 9780393874921
Author: PALEN
Publisher: Norton, W. W. & Company, Inc.
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Chapter 21, Problem 19QP
To determine

Whether Hubble law imply that our galaxy is sitting at the centre of universe.

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The Andromeda Galaxy is a member of the Local Group of galaxies. It is approaching us. Does this mean that the Hubble Law is wrong? Why or why not? Explain.
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.
How does the age of the universe relate to the Hubble constant?   a. The smaller the constant, the older the universe.   b. The larger the constant, the older the universe.   c. The Hubble constant is the age of the universe.   d. The Hubble constant is the square of the universe.   e. It is impossible to tell the age of the universe from the Hubble constant.
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