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Why do astronomers looking at distant galaxies talk aboutlooking backward in time?

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter5: Relativity

Section: Chapter Questions

Problem 32P: How fast would a 6.0 m-long sports car have to be going past you in order for it to appear only 5.5...

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Why do astronomers looking at distant galaxies talk about
looking backward in time?

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