Re: OT: Gravity, Dark Energy, Universal expansion
 

That's a better description than I could find anywhere else http://forum.shrapnelgames.com/images/smilies/happy.gif

Re: OT: Gravity, Dark Energy, Universal expansion
 

...What about the inertial reference frame of one object being pulled by the other, which is pulled by the other one...

Sure, it's recursive. But some recursives do have solutions.

Re: OT: Gravity, Dark Energy, Universal expansion
 

By definition, inertial reference frames can not be accelerated. So, an object being accelerated does not have its own inertial reference frame.

Re: OT: Gravity, Dark Energy, Universal expansion
 

That falls under the "no such inertial reference frame exists" clause, and the speed of gravity does matter for such systems. Technically the Sun is accelerating so no inertial reference frame has it perfectly at rest either, but the difference is small enough on the scale of the solar system that it hardly matters.

Re: OT: Gravity, Dark Energy, Universal expansion
 

Even more to consider Link

Re: OT: Gravity, Dark Energy, Universal expansion
 

Acceleration is simply another factor. Just factor it out.

Re: OT: Gravity, Dark Energy, Universal expansion
 

The universe doesn't work that way... try throwing a ball on a merry-go-round sometime http://forum.shrapnelgames.com/images/smilies/happy.gif

Re: OT: Gravity, Dark Energy, Universal expansion
 

You could throw a fancy dress ball on a merry-go-round and it would be super-fun-cool. http://forum.shrapnelgames.com/images/smilies/wink.gif

Re: OT: Gravity, Dark Energy, Universal expansion
 

A ball on a merry-go-round would most likely be considerably more complex than two stellar objects moving towards each other - Ignoring all other stellar objects)