The universe is a dynamic place in which
stars and planets are continually changing, dying, and
being formed from the debris of earlier generations. A Star’s
life cycle, including birth and death, depends on its mass.
High mass stars die quickly (in millions of years) while
low mass stars live a very long time (billions of years).
When stars die, they recycle elements that can become other
stars, sometimes planets and maybe life.
Of the 100 billion
stars in the Milky Way galaxy, there are many different
kinds. Our Sun, the only life-supporting star we know, is
an ordinary, middle-aged star. It is located within one of
the Milky Way’s
spiral arms. Stars like our Sun are apt to be good places
to look for earth-like planets and life.