Measuring Motion Speed is the measure of motion. You can find it by dividing the distance covered by the time it takes to travel that distance. Speed of Light If a star is 10 lightyears away, it is about 60 trillion miles distant. 
Light travels through space at 186,000 miles per second. LightYear A light ray travels 5.88 trillion miles a year in space. Star Distance The star Sirius is 9 lightyears away from the solar system. More Earthly Speeds Cheetah: 70 mph
 Whitetailed deer: 32 mph
 Human being: 27.89 mph
 Garden snail: 0.03 mph
 Fastest automobile: 205 mph
 Fastest train: 252 mph
 Fastest helicopter: 249.10 mph
 Fastest jet: 2,193.167 mph
Fact Monster/Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved. More on Measuring Motion from Fact Monster:
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