4 ms·
Think about how a Type II supernova happens: http://en.wikipedia.org/wiki/Type_II_supernova http://en.wikipedia.org/wiki/Type_II_supernova
by edem 12y ago
Think about how a Type II supernova happens: http://en.wikipedia.org/wiki/Type_II_supernova http://en.wikipedia.org/wiki/Type_II_supernova