Surveyor 1 lifted off atop an Atlas-Centaur rocket on May 30, 1966, beginning a mission critical to the Apollo program's success. Its landing days later in the Ocean of Storms proved that a spacecraft could touch down gently on the Moon and survive, easing fears that lunar dust might swallow landers, and yielding thousands of images that helped NASA select Apollo landing sites.
Before Surveyor 1, no one knew for certain whether the lunar surface could support the weight of a spacecraft, or whether landers might sink into deep pockets of dust. The mission carried enormous stakes for the Apollo program, then racing toward President Kennedy's end-of-decade Moon landing goal.
Launched from Cape Kennedy on an Atlas-Centaur rocket, Surveyor 1 traveled for three days before firing its retrorockets and settling gently onto the Ocean of Storms, a flat volcanic plain, on June 2, 1966. It was the first fully successful American soft landing on another world, arriving just months after the Soviet Luna 9 achieved the feat.
The spacecraft transmitted more than 11,000 photographs of the lunar surface, revealing a firm, gently undulating terrain capable of supporting a crewed lander. That data reassured engineers at NASA and directly informed the selection of landing sites for the Apollo missions that followed three years later.