Universe: Stars And Galaxies
Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 1, Problem 40Q
To determine

The difference between astronomical observations and other sciences.

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What is an astronomical unit? In what context ( For example galaxies, solar systems and planets, places on Earth) do astronomers use this unit of distance?
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