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anne-ology wrote:
             why there cannot be a satellite for the southern hemisphere
which speaks with the northern one  [??? - is the $64,000 question;-)  ]

Actually, most satellites used for communications are geostationary and sit over the equator. Whether they look north or south depends on which way the antennas are pointed. However, for the past several years, fibre optic cables have taken over most of the connections that had been carried via satellite.

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