Comment Re:Question (Score 1) 128
a star tens of times more massive than the sun that exhausted its nuclear fuel, exploded, then collapsed to form a black hole.
If it exhausted its "nuclear fuel," how could it explode?
When they say the fuel is "exhausted", what they really mean is that there is no longer enough to maintain an equilibrium with gravity. There is still a lot left. As gravity sucks down the remaining fuel it increases the pressure, heating it up enough for a big fusion reaction.