ISS Tranquility Module (Node 3)
Tranquility, also known as Node 3, is a module of the International Space Station (ISS). ESA and the Italian Space Agency had Tranquility built by Thales Alenia Space. A ceremony on November 20, 2009 transferred ownership of the module to NASA. The module provides six berthing locations, but three of those locations are disabled, as modules originally planned to be attached to Tranquility were canceled. STS-130 brought the Cupola, a large window module and robotics work station to the ISS, which was then attached to the nadir-side of Tranquility. The module also includes various ISS systems, including additional life support systems.
The Cupola is an ESA-built observatory module of the International Space Station (ISS). Its seven windows are used to conduct experiments, dockings and observations of Earth. It was launched aboard Space Shuttle mission STS-130 on 8 February 2010 and attached to the Tranquility (Node 3) module. With the Cupola attached, ISS assembly reached 85 percent completion. The Cupola’s 80 cm (31 in) window is the largest ever used in space.