I think 13,000 seems quite a lot but I know there are quite a lot in space. 1 crashed into the Pacific the other day. I dont think earth needs 13,000 satellites, after all what do we need them all for? I expect NASA and other space companies have a lot up there and obviously TV channels and phone companies have them up there. I dont know exactly but it wouldnt suprise me if there was a lot of satelllites, 2,000 seems more likely.
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Satellites are in space not in countries.
Space junk,meteorites and solar wind
millions, if you count natural satellites.
they are powered by ground control on earth
Titanium is the most commonly used material for making satellites.