The discussion about dark energy and the acclerating universe reminds me to the Prolemeic epicycles.
very complicated, helps to explain something which otherwise couldn't be explained in the framework of the wrong concept. At that time
it was the wrong geocentric theory, now it's the wrong idea of an accelerating universe.
link http://abyss.uoregon.edu/~js/glossary/ptolemy.html
clear skies
Dr Andrew
P.