Satellites

• History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I, the first satellite to be successfully launched to space.

• 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

And Now

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

Presentation by

• Tai Sia Taveepanichpan [Tai]

• Narongsak Watrsang [Knight]