IPA: /ˈspʌt.nɪk/
KK: /ˈspʌt.nɪk/
A type of satellite that was launched by the Soviet Union, starting with the first one in 1957, which orbited the Earth and was used for various scientific purposes.
The launch of Sputnik marked the beginning of the space age.
Sputnik originates from Russian "спутник" (meaning satellite or companion). The word is derived from "с" (meaning with) and "путник" (meaning traveler). Thus, it refers to a traveler or companion in space.
Think of a 'companion' or 'traveler' in space when you hear 'sputnik', as it literally means a satellite or companion.