ESS COSMC PERSPCT ALC&MOD W/ACCESS
ESS COSMC PERSPCT ALC&MOD W/ACCESS
7th Edition
ISBN: 9780134773629
Author: Bennett
Publisher: PEARSON
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Chapter 1, Problem 25EAP

The star Betelgeuse s about 600 light-years away. If it explodes tonight, (a) we’ll know because it will be brighter than the full Moon in the sky. (b) we’ll know because debris from the explosion will rain down on us from space. (c) we won’t know about it until about 600 years from now.

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