The Soyuz is a series of spacecraft developed by the Soviet Union and now operated by Russia. It has been used for human spaceflight since the 1960s and is known for its reliability and safety. The spacecraft can carry up to three astronauts to low Earth orbit, making it a vital part of international space missions, including trips to the International Space Station (ISS). The Soyuz consists of three main modules: the orbital module, the descent module, and the service module. The descent module is where astronauts sit during launch and landing, while the orbital module can remain in space for extended periods. Over the years, the Soyuz has undergone several upgrades, ensuring it remains a key player in space exploration.