I am talking less about the molecules, and more about the "gravity" fluctuation issues "orbiting" presents.
Agree that Earth has "bumps" on it; The varying altitudes across the "globe" create unstable "gravitational pulls".
Melding that with Earths' "constant spinning" creates variables not addressed by current "orbiting" explanations.
Nearing Earth in an "orbit" would require navigational correction, as would distance away from it.
Except for in the case of a perfect circle, there can be no "perfect orbit".
Only, we all know Earth is an pear shaped egg thingy.
Well, now globular theorists claim that orbits are ellipsoidal, but again, that is impossible.
At the very least, one would have to explain why the pull of Earth would not crash them, when nearest Earth.
Keep in mind, until the "oblate spheroid" model was implemented, perfectly circular "orbits" were accepted as truth.
Enter in the atmosphere issue; The drag of even a slight atmosphere necessitates more counteractive thrust.
Unless the satellite is far enough into space where the atmosphere cannot reach it.
Proportionately, the amount of "gravity" available in such areas would not hold a satellite in "orbit".
"Satellites are, to some degree, "mysterious" objects. They travel in space, which feels like an exotic place because most of us have never been there. They are so far away that we cannot see them."
http://science.howstuffworks.com/question378.htm
IMPOSSIBLE??? NEED ENERGY???
What are you talking about???
Think before you talk.
At point A speed is lower and height starts decreasing.
Speed starts increasing because Angular Momentum Conservation Law "requires higher speed on lower distance".
At point B distance is smaller and speed higher, so centrifugal force pulls away while
speed decreases because of, again, Angular Momentum Conservation Law (speed times radius equals constant).
Orbiting object is oscillating between distances Ra and Rp,
its speed starts increasing at point A and decreasing at point B.
If Ra = Rp then speed remains constant and we have circular orbit.
Have you ever rotated small rock or other thing on rope?
Your hand is moving in ellipses, and rock periodically changes speed.
But rock is losing speed because of energy loss at air drag,
and your hand has to add more energy to compensate.
In orbit is pretty high vacuuum. Nothing to drag, except few molecules.
Other thing you get wrong is:
Earth doesn't have to be perfect sphere to have center of mass.
Doesn't have to be sphere at all.
But in reality it is because of gravity caused by size / mass,
except 14 miles high "equatorial bulge" caused by centrifugal force.
Ra and Rp are measured from center of mass of Earth to center of mass of orbiting object.
Not from surface to surface.
For example, geostationary satellites are at 22 300 miles above the equator,
and the very thinnest parts of atmosphere reaches up to 300 miles.
Most of the atmosphere is still within 10 miles from the surface.
https://en.wikipedia.org/wiki/Geosynchronous_orbit