The N-4 series of satellites, a.k.a. Proton-1, carried instruments to study super-high energy cosmic particles. July 16, 1965 at 11:16 UTC · Launch Successful UR-500 — Soviet Space Program, to Low Earth Orbit 81/23 (81L), Baikonur Cosmodrome, Republic of Kazakhstan The world's 455th orbital launch attempt, and 62nd of 1965. Data: Launch Library 2, The Space Devs. Image by Gunter's Space Page via The Space Devs.