when were satellites first launched
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when were satellites first launched
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when was the first manned satellite launched
when was the first us satellite launched
when did us launch first satellite
who launched the first satellite
when was the first satellite released
first satellite launched in the world
when was the first satellite invented
first satellite launch date
when were satellites first launched, when were the first gps satellites launched, when was the first manned satellite launched, when was the first us satellite launched, when did us launch first satellite, who launched the first satellite, when was the first satellite released, first satellite launched in the world, when was the first satellite invented, first satellite launch date
