On Wednesday, February 11, 2015 at 10:48:16 AM UTC-8, a425couple wrote:
So, the stars had to make the heavier elements.
Then burn out or blow up to disperse these elements into
space to renain, or form up in planets, or into other stars.
Do any stars only live 2.8 Billion years (13.8B - 11 B) ?
The heaviest stars can complete their life cycles in just a few million years...
http://en.wikipedia.org/wiki/Star#Massive_stars
Scroll about 1/3 the way down and look for the "AGE" heading...
"The more massive the star, the shorter its lifespan, primarily because massive stars have greater pressure on their cores, causing them to burn hydrogen more rapidly. The most massive stars last an average of a few million years, while stars of minimum mass (red dwarfs) burn their fuel very slowly and can last tens to hundreds of billions of years."
\Paul A