After yesterday’s post about some data that has caused us to rethink a theory, I wanted to follow it up today with an even bigger bit of data that could substantially change an even bigger theory.  Dark energy was discovered as a large-scale repulsive force in the universe that is responsible for the acceleration of its expansion.  It was discovered by looking at type 1a supernovae in distant galaxies.  since the supernovae all explode with the same mass limit, they appear to all have the same intrinsic luminosity.  If we know how bright they actually are, we can compare them...