Zvezda Service Module

The Zvezda Service Module is a crucial part of the International Space Station (ISS), serving as the station's main living and working area for astronauts. It provides life support systems like oxygen, water, and environmental regulation, along with power supply and communication functions. Zvezda also contains controls for the station's orientation and propulsion. Built by Russia, it was launched in 2000 and acts as the backbone of the ISS, supporting crew activities, station operations, and connecting various modules together to maintain a safe and sustainable space environment.