The Soyuz 7K is a series of Soviet spacecraft designed for human spaceflight. Developed in the 1960s, it was part of the larger Soyuz program, which aimed to transport astronauts to and from space. The spacecraft featured a three-module design, including an orbital module, a reentry module, and a service module, allowing for various missions, including docking with space stations. The Soyuz 7K played a crucial role in the early days of human space exploration, contributing to missions like the Soyuz 1 and Soyuz 2. Its design laid the groundwork for future Soyuz variants, which continue to be used for crewed missions to the International Space Station (ISS) today.