COSMIC PERSPECTIVE
COSMIC PERSPECTIVE
8th Edition
ISBN: 9780134073842
Author: Bennett
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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