Getting to GM=tc^3
Here is one way of putting the Universe on a T-shirt. This starts with an attempt to connect the local conditions of Special Relativity, which does not allow for gravity, with the large scale Universe of General Relativity. Nigel does it an even simpler way, by equating inertial energy with gravitational energy. The following derivation has a way of starting arguments, but the pot must be stirred. Start with the metric of Special Relativity:
This has been reviewed many times and no one has found a mathematical error. I recommend that it be published as many places as possible, so more people can check it. It leads to a solution of the supernova redshift problem, without any repulsive energies. I hope you enjoy it too.
UPDATE: Spirited discussion of this post has been happening at Clifford Johnson's Asymptotia. Thanks and a happy holiday to Clifford and all his colleagues.