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English

The existence of Plesetsk Cosmodrome was originally kept secret, but it was discovered by British physics teacher Geoffrey Perry and his students, who carefully analyzed the orbit of the Cosmos 112 satellite in 1966 and deduced it had not been launched from Baikonur Cosmodrome.

Norwegian

Plesetsk kosmodroms eksistens ble til å begynne med holdt hemmelig, men den ble oppdaget av den engelske fysikklæreren Geoffrey Perry og hans studenter, som omhyggelig analyserte banen til satellitten Kosmos 112 i 1966, og utledet at den ikke var skutt opp fra Baikonur kosmodrom.