Re: Theory of Gravity/Geodesic concept of space-time continuum

Lee

I am not sure why you think the Theory of Gravity is being replaced 
by a Geodesic concept of Space-Time. Geodesics are used in General Realtivity
to help understand how Gravity affects Space-Time (space from here on in). 

Basically a Geodesic is the mathematical representation of a straight line in
space. If you then consider the effects of a mass on that space you find that
space `bends' and the Geodesic has a solution that is `bent'. This is 
what is meant by Space-Time Curvature, straight lines are actually
curved or bent by mass. This is interepreted to mean that Gravity is
caused by Mass bending space itself. Another way of looking at all this is to say that
the shortest distance between two points is a Geodesic. 

The more complex the problem the more details are needed in the Geodesic.
For example, models of the gravitational effects of rotating Black holes,
the Kerr Geodesic. 

I will refer you to any general book on General Relativity and a Web search on 
the words "relativity +tutorial", "Kerr Black Holes", "Introduction
to Tensors" or "Stress Energy Tensor".