Re: the end of our sun-white dwarf or red giant?


"kajlina" <china_108@xxxxxxxx> wrote in message
news:1161841587.065523.197700@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
| >From "The case of the missing neutrino" by John Gribbon, written in
| 1997, our sun would turn into a white dwarf after death. From "Parallel
| worlds" by Michio Kaku, written in 2005, our sun would turn into a red
| giant after death.
|
| Which one is correct? Or are both cases possible? Or white dwarf was a
| previous theory while red giant is a more recent one?

"After death" is meaningless, but yes, both are possible. It
is inevitable that eventually all the hydrogen "fuel" is converted to
helium and so a helium core is gradually growing in our sun.
Inside that is an even heavier but smaller core as the helium is
"consumed" and the final state is thought to be a neutron star
like Matryoshka dolls. However, the star can go supernova
before that happens and the entire process is largely conjecture.
This is an obvious expansion:
http://antwrp.gsfc.nasa.gov/apod/ap011227.html

Androcles



.

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