Are the physical heavens subject to decay?
Greek scientist Aristotle, of the fourth century B.C.E., taught that decay happens only on the earth, while the starry heavens could never change or decay. That view prevailed for many centuries. But in 19th century, scientists formulated the concept of entropy. 
It suggests that all matter, whether heavenly or earthly, tends to decay. one of the scientist who help to advance this concept, Lord Kelvin, noted that the Bible says about heaven and earth: "just like a garment they will all wear out." (psalm 102:25, 26) Kelvin believed, as the Bible teaches, that God could choose to prevent such decay from destroying His creations.
-Ecclesiastes 1:4