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Stories about: Vanguard 1

Oldest Satellite in Orbit Turns Fifty Fifty years ago, on this very day, the Unites States Navy launched the fourth artificial satellite into space, Vanguard 1, the first satellite into Earth's orbit to be powered by sunlight. Its mission was to test the capabilities of a three-staged vehicle and the effects of the space environment on artificial sa... 17 March 2008 03:41 GMT