Explorer I-The first successful U.S. satellite
2011-06-17
The first successful U.S. satellite, Explorer I, was launched into Earth orbit by the Army on Jan. 31, 1958, at Cape Canaveral, Florida, four months after Russia orbited Sputnik. The 18-pound satellite had a cylindrical shape and was 80 inches long and six inches in diameter. Explorer I’s small packageContinue Reading