The Russians successfully launched a satellite into orbit; which was followed by successful testing of first laser by Americans. It was further followed by transmission of signal between Europe and United States and lastly the American astronauts walked on the moon.
What are satellites?
Satellites are artificially created technologies that are used for the transmission of signals between two ends. They are mostly used for space operations and transmit data in real-time.
Russians launched the first-ever satellite in the year 1957. Americans tested the first working laser in 1960. Telstar 1 transmitted satellite signals in 1962. Astronauts walked on the moon in 1969.
Hence, the chronological order related to the use of satellites and space operations are as D-A-C-B.
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