మొదటి కమ్యూనికేషన్ శాటిలైట్ ని ఎప్పుడు అంతరిక్షంలోకి పంపించారు ?
The first artificial Earth satellite was Sputnik 1. Put into orbit by the Soviet Union on October 4, 1957, it was equipped with an on-board radio-transmitter that worked on two frequencies: 20.005 and 40.002  MHz. Sputnik 1 was launched as a major step in the exploration of space and rocket development. However, it was not placed in orbit for the purpose of sending data from one point on earth to another.
1957