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  • 1. Satellites
  • 2.
    • History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I , the first satellite to be successfully launched to space.
  • 3.
    • And then the other satellites be follow launched to the space
    • Ex. On January 31, 1958, the tide changed, when the United States successfully launched Explorer I
  • 4. And Now
  • 5.
    • Satellites is very important with the world, it use for the radio active, television signal, telephone signal Etc.
    • In each day, we depend the satellite for every thing that use digital signal
  • 6. Presentation by
    • Tai Sia Taveepanichpan [Tai]
    • Narongsak Watrsang [Knight]