From a thermodynamics point of view, each time reset would be require literally astronomically-high amounts of energy. When a cycle is reset, gas that has dispersed must be recollected into its original distribution. Photons that have escaped the stars must be restored to their original positions. Anything that has decayed (geological, biological, astrological, etc.) would need an outside source of energy to restore the original state of the universe (If the
second law of thermodynamics is to be observed). I won't speculate on how exactly time travel works, but there is a HUGE difference in entropy from one state of the universe to the next. Where Haruhi pulls this energy from worries me a bit.
Does she use something akin to
Maxwell's Demon to get the required energy? Or is this impossible as wikipedia says, due to
"information entropy"?
Any thoughts?