For starters, satellites are not in zero gravity; they are in Earth's gravity, EXACTLY like the oceans and continents are. Satellites are not floating weightless in space; a satellite 200 miles up is pulled toward the Earth with almost the same force (within a few percent) just as if it were on the ground. All satellites are perpetually falling toward the earth; their lateral speed allows them to miss it when they fall. That's why it has to move at 25,000 mph, just to not crash into the Earth. Geostationary sats are the same thing, just less pronounced. And Fermer, the fact that you don't know this should ring an alarm bell in your head about how much you don't know about the relevant physics. I won't, but it should.