As a child I was shocked when someone at the door stated that the sun will die eventually. I said to myself: if this is true, we must be wrong about eternal life on earth.
Later I learned that stars do indeed die and that even the Bible says so:
http://wol.jw.org/en/wol/d/r1/lp-e/2011489
Scientists have since observed that stars may die violently in such explosions or burn out slowly or even collapse on themselves.
In the 19th century, scientist William Thomson, also known as Lord Kelvin, discovered the second law of thermodynamics, which explains why, over time, natural systems tend to decay and break down. One factor that inspired him to reach this conclusion was a careful study of Psalm 102:25-27.
So if stars die, so does our sun. No sun, no earth and no eternal life on earth. Now I understand why we always quote Psalm 104:5 and hardly ever Psalm 102:25-27.