Unity Node "A Bridge to the Future" V1

The Unity connecting module was the first U.S.-built component of the International Space Station. It is cylindrical in shape, with six berthing locations (forward, aft, port, starboard, zenith, and nadir) facilitating connections to other modules. Unity measures 4.57 metres (15.0 ft) in diameter, is 5.47 metres (17.9 ft) long, and was built for NASA by The Boeing Company in a manufacturing facility at the Marshall Space Flight Center in Huntsville, Alabama. Sometimes referred to as Node 1, Unity was the first of the three connecting modules; the other two are Harmony and Tranquility.

Unity was carried into orbit as the primary cargo of the Space Shuttle Endeavour on STS-88, the first Space Shuttle mission dedicated to assembly of the station. On December 6, 1998, the STS-88 crew mated the aft berthing port of Unity with the forward hatch of the already orbiting Zarya module. (Zarya was a mixed Russian-US funded and Russian-built component launched earlier aboard a Russian Proton rocket from Baikonur, Kazakhstan.) This was the first connection made between two station modules.

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