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Deferent – using Ptolemy’s geocentric system, we can see the circle on which the epicycles move.
Deferent
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Deferent – using Ptolemy’s geocentric system, we can see the circle on which the epicycles move.
Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.