A satellite can be defined as a celestial body that is orbiting another bigger and larger celestial body. An artificial satellite is, therefore, a manufactured object or vehicle with the sole purpose of orbiting the earth, the moon or another given celestial body.
The scientific breakthrough of humanity putting an artificial satellite in orbit around the earth was achieved in the year 1957, specifically on October 4th. This scientific fit was first performed by the Russians with the spacecraft named “Sputnik”, a small artificial satellite that orbited the earth for some couple of months and in those periods, transmitted beeps for 21 days!
The next country to be in the space with the artificial satellite was the United States of America in the following year, that is, on January 31st, 1958 which was named “The Explorer1”. Through the data that was transmitted to the earth, the scientists were able to discover Van Allen radiation belts, zones in the space around the earth, and two planets, namely Jupiter and Saturn. These contained high-energy protons and electrons. No doubt, these are wonderful discoveries!