How come stars...?

Question

PLEASE HELP! how come the younger the star, the greater the mass? (or how come the older the star the less mass it has.)

gracias! =]

Answer 1

While it is true that a very old star will have a relatively low mass, you can't assume that a young star will be massive. You *can* assume that a massive star is relatively young, because these very large stars burn very hot and very fast.

Astronomers can tell how old a star cluster is by noting what the largest stars still on the main sequence are. A large cluster is born with stars of all sizes, but over time the larger ones first turn into red giants and then die, either as supernovae or white dwarfs. The longest-lived stars are red dwarfs, which can burn for trillions of years (in theory, since the universe is not yet that old). But, since stars are still being born, there are also very young red dwarfs.

Answer 2

The first massive stars took hundreds of millions of years to form,they averaged about 20 solar masses,and they died and blew up in about 10 million years
The rocky material that was ejected crashed into the hydrogen field that the massive star coalesced from.
This started the formation of our solar system which was fairly rapid,maybe tens of millions of years.
The sun is a star that is just below average stellar mass,which endows on it a fairly long life,more than 6 billion years.
The ejecta from the super nova did not only initiate our solar system but thousands of others at the same time.