I am not aware of a Gemini Spacecraft that went to the moon. The Apollo missions in the late 60's and the 70's went to the moon. Apollo 11 was the first manned flight that took men to the surface of the moon. Neil Armstrong was the first man to step on the moon. Part of the reasoning for the moon missions was to learn more about the universe and its origin. There was also a dimension of technical competition between the US and the Soviet Union, to prove technological superiority during the "cold war." Many products that we enjoy every day are a result of technological advances from the research and development done by NASA for the moon missions.
Mercury and Gemini
Gemini, Apollo, STS
Gemini, Mercury, and Apollo.
Are you maybe referring to the Mercury and Gemini programs?
The first three space programs that contributed to the US moon landing were Mercury, Gemini, and Apollo. Mercury laid the groundwork for human spaceflight, Gemini focused on developing techniques for space travel, and Apollo successfully achieved the goal of landing astronauts on the moon.
The Gemini space program officially ended in 1966. Gemini was an intermediate space program conducted by NASA between the Mercury and Apollo programs, focusing on testing the capabilities necessary for the Apollo missions to the moon.
The two US manned space programs that preceded Apollo were Mercury and Gemini. The Mercury program aimed to put a human in orbit around the Earth, while the Gemini program focused on developing the necessary skills and technologies for space travel to the Moon.
NASA was still a young agency when Apollo was introduced. The first space program was Mercury, whose mission was to launch astronauts, one at a time, into space and then into orbit. Following Mercury was the Gemini program. Gemini spacecraft held two astronauts and saw was the first to really start with science and gear experiments. It was during Gemini that Ed White became the first American to perform an EVA (spacewalk). Apollo directly followed Gemini, and the Space Shuttle program followed Apollo.
The first three space programs in the US were Project Mercury, Project Gemini, and Apollo program. These programs were instrumental in advancing human space exploration and culminated in the first human landing on the Moon during the Apollo missions.
American human flight programs were; Mercury, Gemini, Apollo, Shuttle, the recently nixed Orion, and the up and coming SpaceX Falcon series. The last of which is the largest private space venture in history.
The purpose of the Mercury, Gemini, and Apollo missions was to develop and test the technologies and capabilities needed to send astronauts to the Moon and safely return them to Earth. Each program built upon the achievements and lessons learned from the previous one, with Mercury laying the foundation, Gemini focusing on developing skills for spacewalks and rendezvous, and Apollo ultimately achieving the goal of landing humans on the Moon.
Mercury was first, followed by Gemini and Apollo.