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ملف:Smithsonian Institution Archives - 2002-32252.jpg

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Looking down on the Baker-Nunn Camera, one of the world's most sensitive devices for observing artificial satellites. A network of twelve tracking stations equipped with such cameras is maintained by the Smithsonian Astrophysical Observatory for the observation of both natural and artificial objects in space. The stations are located in Argentina, Australia, Curacao, India, Iran, Japan, Peru, South Africa, Spain, and at three sites in the United States

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مصدر Smithsonian Institution Archives
مؤلف Smithsonian Institution Archives

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دلوقتي14:22، 8 اكتوبر 2012تصغير للنسخة بتاريخ 14:22، 8 اكتوبر 2012979 × 768 (153 كيلوبايت)M.casanova

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