Major delays in the construction of the International Space Station occurred due to cutbacks in funding by the Russian government. Even so, the first launchings took place in late 1998. It was launched on Nov. 20, 1998. Zarya has its own propulsion, guidance, and electrical and heat-control systems. The second module, Unity, was built by the United States.
Unity has six hatches.
One is connected to Zarya, and the others will serve as connectors for the other modules. How to cite this article.