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| | Office of Space Operations (Site not responding. Last check: ) |
 | | The International Space Station (ISS) assembly consists of the energy and control block FGB "Zarya", the U.S. connecting module "Unity", the Russian Service Module "Zvezda" and the first element, Z1, of the future solar-array-carrying truss, on top of the Node Unity. |
 | | During Shuttle mission 3A (STS-92), the third docking adapter PMA-3 was also added, followed in the next mission, 4A (STS-97), by the second truss element, the photovoltaic module P6 which was mounted on top of the Z1 where it deployed two gigantic solar array wings measuring 240 feet tip-to-tip. |
 | | It is visible to the naked eye as a bright star in the morning or evening sky, appearing or disappearing at the horizon or in Earth’s shadow, if the sky is without overcast and haze. |
| www.hq.nasa.gov /osf/station/viewing/issvis.html (245 words) |
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