Lifecycle of Stars

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Papa Fox  

Posted:
Fri Apr 20, 2007 11:52 pm

Joined: 20 Sep 2005
Posts: 5
Lifecycle of Stars

Can someone gove me a general rule of thumb as to which stars go supernove and which become red giants and then white dwarfs?


Marc   Site Admin

Posted:
Sat Apr 21, 2007 10:11 am

Joined: 24 Oct 2003
Posts: 115
Location: Ireland
stars going supernovae

Roughly, if a star has greater than 8 times the mass of our Sun it will go supernova (type II supernova). Stars like the Sun will become first red giants then white dwarfs, never going supernova. There is an exception to this however:

If the white dwarf happens to be part of a binary star system it may suck the mass of its companion star and if/when it grows large enough it then goes supernova (type I supernova).


jessekaye  

Posted:
Wed Feb 10, 2010 10:28 pm

Joined: 05 Feb 2010
Posts: 3

Stars are born in nebulae. Huge clouds of dust and gas collapse under gravitational forces, forming protostars. These young stars undergo further collapse, forming main sequence stars.

Stars expand as they grow old. As the core runs out of hydrogen and then helium, the core contacts and the outer layers expand, cool, and become less bright. This is a red giant or a red super giant (depending on the initial mass of the star). It will eventually collapse and explode. Its fate is determined by the original mass of the star; it will become either a black dwarf, neutron star, or black hole.
or to better understand star' life cycle


barry.armstead  

Posted:
Tue Feb 23, 2010 7:36 am

Joined: 06 Jul 2006
Posts: 167
Location: canberra

Good work Jessekaye.

Baz.


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