The name of the world's first artificial satellite is Sputnik 1. Launched by the Soviet Union on October 4, 1957, Sputnik 1 marked a significant milestone in the Space Age and the beginning of the space race. The satellite was a spherical capsule about 58 centimeters in diameter, equipped with four antennas that broadcast radio pulses. Its successful launch demonstrated major advancements in space technology and prompted increased interest and competition in space exploration among nations. Sputnik 1 remained in orbit for approximately three months before re-entering the Earth's atmosphere, leaving a lasting legacy in science and technology.