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originally posted by: blackcrowe
a reply to: wildespace
It's not possible for a Solar System object to be constanly positioned over the Earth's north pole, is it?
Not sure what you mean with your comment. This is from wiki about geostationary satellites.
Geostationary satellites have a geostationary orbit (GEO), which is 36,000 kilometres (22,000 mi) from Earth’s surface. This orbit has the special characteristic that the apparent position of the satellite in the sky when viewed by a ground observer does not change, the satellite appears to "stand still" in the sky. This is because the satellite's orbital period is the same as the rotation rate of the Earth. The advantage of this orbit is that ground antennas do not have to track the satellite across the sky, they can be fixed to point at the location in the sky the satellite appears.
From here. en.wikipedia.org...