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Satellite Quiz: How Well Do You Know What's Orbiting Earth?

SPACE.com Staff
Date: 24 July 2012 Time: 04:00 AM ET
Lifes-little-mysteries
The space age dawned with the launch of Sputnik 1, Earth's first artificial satellite, in 1957. Thousands of additional spacecraft have followed in Sputnik's footsteps, serving humanity in a variety of ways. How well do you know Earth's satellites?
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A Soviet technician works on Sputnik 1 before the satellite's Oct. 4, 1957 launch.
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