After several earlier failed attempts, Explorer 1 was launched on January 31,
1958, and became the first US satellite that actually succeeded in achieving
Earth orbit.
Explorer 1 revolved around Earth in a looping orbit that took it as close as 354 km
(220 mi.) to Earth and as far as 2,515 km (1,563 mi.). It made one orbit every
114.8 minutes, or a total of 12.54 orbits per day.
Explorer 1 made its final transmission on May 23, 1958. It entered Earth's
atmosphere and burned up on March 31, 1970, after more than 58,000 orbits.
The satellite weighed 14 kg (30.8 lb).
The satellite itself was the third stage of the launch vehicle. A cylinder shape,
looking exactly like a small rocket, it was 94.6 centimeters (37.25 inches) long
and 16.5 centimeters (6.5 inches) in diameter. Its total length, complete with
attached rocket motor, was 2.05 meters (80.75 inches)
Explorer 1 was launched on January 31, 1958. It was the first satellite launched by the United States.
11110000 years
Explorer 1 was launched to become the first satellite of the United States. It was part of the US effort to explore space and was a response to the successful launch of the Soviet satellite Sputnik. Additionally, Explorer 1 carried scientific instruments to study cosmic rays and radiation in space.
NASA launched its first satellite, Explorer 1, on January 31, 1958.
The name of the first American satellite in space was called Explorer 1.
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