Some time ago we had a discussion on the Doomsday arguments advanced by John Leslie and others. This spills over into anthropic cosmology, the Great Filter, etc. The Guardian published an account recently of a paper (posted on the Net) by Lawrence Krauss and Glenn Starkman, both of Case Western Reserve U., that the newly discovered acceleration of the observable universe implies a light-cone horizon that will isolate our local cluster some 100 billion years from now. The farthest galaxies will start to be carried away faster than light some 15 billion years hence.
I wonder what impact this has on the Leslie argument?
Indeed, I wonder if it has any salience to the traditional explanation for Olber's paradox. Might the universe be eternal after all, except for bubbles like our own that are observable only under (somewhat) anthropic conditions?
Damien Broderick