Crossword Genius

Any of a series of Soviet satellites, such as — I, launched in 1957 (7)

Ross

I believe the answer is:

sputnik

(Other definitions for sputnik that I've seen before include "Early Soviet satellite" , "First man-made satellite to orbit the earth" , "Soviet space orbiter" , "UK pints (anag)" , "used to encircle the globe" .)

I've seen this clue in The Mirror.
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