(August 11, 2015 at 7:40 am)ignoramus Wrote: Alex, out of curiosity, is there such a thing as perpetual motion in the universe?
eg: planets spinning around the sun, etc
or must THAT also come to an end at some stage by loss of energy somewhere? (any latency issues here)
Even if you ignore tidal friction, a planetary system is basically a gravitational wave emitter and would gradually lose its rotation to gravity waves which then get redshifted away. We are however talking loooong times here, orders of magnitude longer than the current age of the universe.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition