I'm glad this aberration thing came up. But as I said, on a Google search learned men seem to make confusing contradictions of what it is. I have to get above it before I comment. Alan your statements of umbrella and rain is just as confusing. Bad analogy Light does not act like a spray from a hose. Will be back on this one. Im sure it will have a simple explanation. All respects to Neville, I do not think it necessary to have all the stars equa distant. That is getting too close to a canopy with little holes and the light of heaven shining through. Might just well be that........hmm. Phil