The New Encyclopędia BritannicaEncyclopędia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 360
... Earth orbital velocity is about 18,000 miles ( 29,000 kilometres ) per hour . Since this 125 - mile altitude is above most of the atmosphere , aerodynamic drag is not great , and the spacecraft will continue to orbit for an extended ...
... Earth orbital velocity is about 18,000 miles ( 29,000 kilometres ) per hour . Since this 125 - mile altitude is above most of the atmosphere , aerodynamic drag is not great , and the spacecraft will continue to orbit for an extended ...
Page 372
... Earth survey satellites . This broad category of satel- lites has progressed from initial relatively simple photog- raphy to include many forms of observation of the Earth . Weather . Meteorological , or weather , satellites operate ...
... Earth survey satellites . This broad category of satel- lites has progressed from initial relatively simple photog- raphy to include many forms of observation of the Earth . Weather . Meteorological , or weather , satellites operate ...
Page 799
... Earth's orbit , the average of its greatest and least dis- tances from Earth , is the astronomical unit , adopted by the International Astronomical Union as 149,600,000 ki- lometres , or 92,957,000 miles . Because the Earth's orbit is ...
... Earth's orbit , the average of its greatest and least dis- tances from Earth , is the astronomical unit , adopted by the International Astronomical Union as 149,600,000 ki- lometres , or 92,957,000 miles . Because the Earth's orbit is ...
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