CNET News.com reports: "After some spectacular failures, the United States successfully launched its first satellite, Explorer 1, into Earth's orbit on January 31, 1958. It was an important step for the United States in the Cold War and its first response in the space race after Russia had successfully launched two satellites. Sputnik 1 began orbiting Earth in October 1957 and Sputnik 2, which carried a dog, launched in November 1957."
Everyone has heard about Sputnik, but have you ever hear about the Explorer 1?
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