Thank you, Bob, nicely worded. If someone asked me to give one "proof" of heliocentric "correctness," I would say the "geostationary satellite." (Fortunately, people don't usually ask me this question ! ) Neville. Bob Davidson <Jesus4me@xxxxxxxxxxx> wrote: In the HC model, there are two primary vectors for describing the motion of a geostationary satellite: one toward Earth (gravity) and the other perpendicular to the first (satellite inertia). In the GC model, and assuming no other "outside" forces such as frame dragging or an aether wind, there must also be two primary vectors for a geostationary satellite to exist: one toward Earth (gravity) and the other equal and opposite to that gravity. We know that satellites do not continuously generate such an equal and opposite force to gravity. Therefore, for GC to work there must be an outside force vector acting on the satellite. If the outside force is tending to "push" or "pull" objects around the Earth, a geostationary satellite could not remain in place without continuously generating a counterforce. However, satellites do not continuously generate counterforces. If the outside force is tending to resist Earth's gravity, such that there is a center of gravity between Earth and rest of the Cosmos, then we would not accelerate a satellite into orbit but would instead take it up to a point of balanced gravity and bring it to a standstill. This does not happen either. These thoughts lead me to agree with Neville and conclude that either geostationary satellites do not exist or GC has a serious problem. Bob Send instant messages to your online friends http://uk.messenger.yahoo.com