SvennoJ on 09 August 2011
@Netyaroze Ahh that makes sense, thanks.
Another question I have is with dark energy. It seems it was introduced to explain the accelerating expansion of the universe. The acceleration is deduced by measuring distances to a certain type of supernova, at different points in the past, that are considered to always occur at the same color and brightness.
How can we be sure of that? Is it possible that in the distant past these supernova might have been slightly different?
Is it possible that the expansion of the universe isn't accelerating after all, that it's an optical illusion?
Maybe constants changing over time is an even worse explanation then dark energy?
