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RE: How low can a satellite go to stay in orbit?
I did a post on a new type of satellite being developed by the European Space Agency: ESA's Air Breathing Satellite.
It is basically an ion engine that uses the tenuous air in the extreme upper atmosphere to counteract the drag forces.
It's a neat idea.
I replied this message before, but it appears my slow network did not allow it to reflect. I read your article, and I think it is quite innovative. I think it may even be cheaper than the current technology when it is implemented. Let's hope it does just that.