Am 28.10.2011 01:07, schrieb Alain:
> Forget the Sun going nova. It will just NEVER appen, it simply don't
> have the required mass by at least a factor of 15, probably some more.

Well, the sun is pretty unlikely to go nova indeed, but strictly 
speaking the reason for this is not the mass (which would be 
sufficient), but its utter lack of a close companion star :-P

What you seem to have in mind is actually a SUPERnova. (Even then, the 
mass limit is lower than the factor of 15 you mentioned, which sounds 
more like the estimated limit required for a star to end as a black 
hole; for a supernova event, a collapse to a neutron star will do.)

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