First docking of two crewed spacecraft around another celestial body

The Apollo 10 mission marked a pivotal achievement in space exploration as it accomplished the first docking of two crewed spacecraft around another celestial body, specifically the Moon. This mission served as a critical test for the subsequent Apollo 11 mission, which would ultimately land humans on the lunar surface. Apollo 10 included a command module, named Charlie Brown, and a lunar module, named Snoopy, which were designed to simulate the conditions of a lunar landing without actually landing on the Moon. The successful docking maneuver demonstrated the capabilities of the spacecraft and the proficiency of the astronauts in executing complex operations in space. This mission was instrumental in validating the technology and procedures that would be used in future lunar landings, providing essential data on the performance of the spacecraft systems in the lunar environment.