The mission of the Pegasus spacecraft was to measure meteoroid abundances in the region near the earth. May 25, 1965 at 07:35 UTC · Launch Successful Saturn I — National Aeronautics and Space Administration, to Low Earth Orbit Space Launch Complex 37B, Cape Canaveral SFS, FL, USA The world's 437th orbital launch attempt, and 44th of 1965. Program: Apollo Data: Launch Library 2, The Space Devs. Image by NASA (NASA Image and Media Guidelines) via The Space Devs.