The Cosmic Perspective (8th Edition)
The Cosmic Perspective (8th Edition)
8th Edition
ISBN: 9780134059068
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 1, Problem 42EAP

Spacecraft Communication. We use radio waves, which travel at the speed of light, to communicate with robotic spacecraft. How long does it take a message to travel from Earth to a spacecraft at

a. Mars at its closest to Earth (about 56 million km)? b. Mars at its farthest from Earth (about 400 million km)? c. Pluto at its average distance from Earth (about 5.9 billion km)?

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The Cosmic Perspective (8th Edition)

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