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"extract": "Intelsat I was the first commercial communications satellite to be placed in geosynchronous orbit, on April 6, 1965. It was built by the Space and Communications Group of Hughes Aircraft Company for COMSAT, which activated it on June 28, 1965. It was based on the Syncom series of satellites that Hughes had previously built for NASA to demonstrate that communications via synchronous-orbit satellite were feasible. Its booster was a Thrust Augmented Delta. After a series of maneuvers, it reached its geosynchronous orbital position over the Atlantic Ocean at 28\u00b0 West longitude, where it was put into service.",
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"extract": "Intelsat I was the first commercial communications satellite to be placed in geosynchronous orbit, on April 6, 1965. It was built by the Space and Communications Group of Hughes Aircraft Company for COMSAT, which activated it on June 28, 1965. It was based on the Syncom series of satellites that Hughes had previously built for NASA to demonstrate that communications via synchronous-orbit satellite were feasible. Its booster was a Thrust Augmented Delta. After a series of maneuvers, it reached its geosynchronous orbital position over the Atlantic Ocean at 28\u00b0 West longitude, where it was put into service.",
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"extract": "A satellite or an artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation (GPS), broadcasting, scientific research, and Earth observation. Additional military uses are reconnaissance, early warning, signals intelligence and, potentially, weapon delivery. Other satellites include the final rocket stages that place satellites in orbit and formerly useful satellites that later become defunct.",
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"extract": "A geosynchronous orbit is an Earth-centered orbit with an orbital period that matches Earth\u0027s rotation on its axis, 23 hours, 56 minutes, and 4 seconds. The synchronization of rotation and orbital period means that, for an observer on Earth\u0027s surface, an object in geosynchronous orbit returns to exactly the same position in the sky after a period of one sidereal day. Over the course of a day, the object\u0027s position in the sky may remain still or trace out a path, typically in a figure-8 form, whose precise characteristics depend on the orbit\u0027s inclination and eccentricity. A circular geosynchronous orbit has a constant altitude of 35,786\u00a0km (22,236\u00a0mi).",
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"text": "Launch of Early Bird, the first commercial communications satellite to be placed in geosynchronous orbit.",
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"text": "Launch of Early Bird, the first commercial communications satellite to be placed in geosynchronous orbit.",
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