Assembly of the International Space Station

The Assembly of the International Space Station is a major aerospace engineering endeavour being conducted in Low Earth orbit by a consortium of governmental and inter-governmental space agencies.

Zarya, the first ISS module, was launched by a Proton rocket on 20 November 1998. The STS-88 shuttle mission followed two weeks after Zarya was launched, bringing Unity, the first of three node modules, and connecting it to Zarya. This bare 2-module core of the ISS remained unmanned for the next one and a half years, until in July 2000 the Russian module Zvezda was added, allowing a minimum crew of two astronauts or cosmonauts to be on the ISS permanently.

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