Launched in 1957, Sputnik 2 was the second artificial satellite to be put into Earth orbit and the first satellite to carry a living passenger, a dog named Laika (a Russian word meaning "barker"). More »

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Sputnik I, the world's first artificial satellite, was launched by the Soviet Union on Oct. 4, 1957. It was 22.8 inches in diameter, weighed 183.9 pounds and took about 98 minutes to orbit the earth. The satellite had fo... More »

Like most space endeavors, Sputnik 1 was a team effort. However, Mikhail Khomyakov is typically credited with doing most of the design work on Sputnik 1. More »

Sputnik I, the world's first artificial satellite, was launched by the Soviet Union on Oct. 4, 1957. It was 22.8 inches in diameter, weighed 183.9 pounds and took about 98 minutes to orbit the earth. The satellite had fo... More »

Like most space endeavors, Sputnik 1 was a team effort. However, Mikhail Khomyakov is typically credited with doing most of the design work on Sputnik 1. More »

In July 1958, Congress passed legislation establishing NASA, in response to the Soviet Union's launching of Sputnik, the first man-made satellite. Later that year, NASA began Project Mercury, the first U.S. human spacefl... More »

www.reference.com Science Astronomy Space Travel

A satellite works by receiving a signal from Earth and sending the signal back to the Earth. The signal that bounces off the satellite is made stronger before traveling back to the Earth. People on Earth send signals to ... More »