| 翻訳と辞書 | Lincoln Calibration Sphere 1| Lincoln Calibration Sphere 1  : ウィキペディア英語版 | 
 
 The Lincoln Calibration Sphere 1 is a large aluminium sphere in Earth orbit since 06 May 1965. It is the oldest spacecraft still in use, having lasted for over 50 years. It was launched along with LES-2 on Titan IIIA. It is technically the oldest operational spacecraft, but it has no power supply or fuel and thus is merely a metal sphere. It has been used for radar calibration since its launch. It was built by Rohr. Corp. for the MIT Lincoln Laboratory.
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 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』
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