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What was the first satellite the United States successfully launched?

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  1. Vanguard 1
  2. Telstar
  3. Explorer 1

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References

  1. NASA JPL, Explorer 1 www.jpl.nasa.gov/missions/explorer-1 Checked 2026-10-10.
  2. NASA Glenn, Rocket History: 20th Century and Beyond www.grc.nasa.gov/www/k-12/rocket/BottleRocket/20thBeyond.htm Checked 2026-10-10.

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