Gemini had two man crews and their objectives were to learn how to fly, navigate, rendezvous, and dock spacecraft while in orbit. In addition, they had to learn how to work outside of the spacecraft in zero gravity and discover the long term impacts of spending the amount of time in space it would require to go to the moon and back. All of these mission objectives built a knowledge base which then allowed the US to do all the things we needed to do in order to complete a mission to the moon
The Apollo program had three man crews and their objective was to take the collected knowledge of the Mercury and Gemini programs and fly to the moon and land there. Once there their objectives were to conduct scientific research about the origin and geological make up of the moon.
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The Apollo missions were focused on landing humans on the moon and bringing them back safely to Earth, while the Gemini missions focused on developing and testing the technologies and techniques needed for future Apollo missions. Apollo missions also had larger crews and more complex spacecraft than Gemini missions.
The space program before the Apollo missions was called the Gemini program. There were a total of 10 manned Gemini missions between 1964 and 1966, which focused on testing rendezvous and docking maneuvers essential for the eventual Apollo lunar missions.
The Gemini Project lasted Between 1962 and 1966 and developed key techniques and equipment later used on the Apollo missions. Over the years 1965 and 1966, the Gemini Project sent a total of 16 Astronauts on 10 different missions into orbit.
The purpose of the Gemini missions was to test and develop the skills and technologies needed for the Apollo missions to land astronauts on the moon. These missions helped NASA learn how to rendezvous and dock spacecraft, conduct spacewalks, and live and work in space for extended periods of time.
There were a total of 12 missions in the Project Gemini program, which ran from 1961 to 1966 and aimed to develop the skills and technology necessary for the Apollo missions to land astronauts on the moon. Each Gemini mission tested different aspects of spaceflight, such as rendezvous and docking, spacewalking, and long-duration missions.
The Gemini program came first. It was a precursor to the Apollo program and its main goal was to develop the techniques needed for the Apollo missions to the moon. The Apollo program followed the Gemini program and its main objective was to land humans on the moon and bring them back safely to Earth.