Some satelites is just hanging there in a geostationary position, like TV satelites, communication satelites etc. Some other satelites are moving around the earth with a time for rotating around the earth like something like 2-3 hours (??!!) How can this be, some of then is just hanging, some are moving around with great speed. How can this be ? Is the explanation as simle that they are doing their journey on different altitudes so that thy will have different tangential speed ? Could it be that those that are moving around the earth at high speed balance out a higner gravitational force using the higher speed, while those that has geostationary levels are moving more slowly due to a smaller gravitational force ? Is it like that and will it then be like that all geostationary satelites have to be located on the same level to balance out the gravitational force using the sentripetal accelleration ? Faster satelites should then be on a lower level right ? What would then be the (sipmplified) equataion for the speed of a satelite on a established level ? Is it true that all geostationary satelites are on the same level ?