The name of the first man-made satellite, launched by the Soviet Union in 1957, was Sputnik. Hence, option D is correct.
What is the significance of a satellite?
A satellite is a device or a machine, which is sent to the outer space in order to send and receive signals of multiple information or data directly to the source receiving point.
A number of countries' space organizations have made their own satellites. However, the first ever man-made satellite was made by Russia. It was named Sputnik.
Hence, option D is correct regarding a satellite.
Learn more about a satellite here:
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