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Not counting its radio antennas, Sputnik, the first satellite in space, was about the size of what?
- A beach ball:On October 4, 1957, history was changed forever when the Soviet Union successfully launched Sputnik I. The world's first artificial satellite was approximately the size of a beach ball (22.8 inches in diameter), weighed only 183.9 pounds, and took about 98 minutes to orbit Earth on its elliptical path. The polished metal sphere was equipped four external radio antennas for transmitting radio pulses. Sputnik orbited the Earth 1,440 times and travelled a distance of about 43 million miles. The surprise success of Sputnik 1 marked the start of the US-USSR Space Race.
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