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There are a number of famous space probes. The Sputnik was the first satellite launched into orbit by the Russians on October 4, 1957.

The Pioneer 10 and Pioneer 11 were the first deep space probes to make closeup observations of Jupiter.

Voyager 1 & Voyager 2 were launched to make flyby observations of all the planets in the solar system, and Voyager 1 is now the most distant man-made object in space.

The Twin Helios Spacecraft were launched into an orbit around the sun and have the distinction of being the fastest spacecraft with a speed of about 157,000 mph (252,792 km/h).
The speed of light is about 299,792,458 m/s, or about 1,079,252,848 kph. So, the fastest spacecraft launched by man is only traveling at approximately 1/4,000 the speed of light.

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15y ago

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