Ok, so you're mixing in your old confusion about supernovas and project it to their words. I don't think their words had that implication at all.
Regarding "why brother", already told you: they are born very similarly. What makes someone your brother? Common parent. Here too, black holes and neutron stars have a common parent, a big collapsing star.
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timeasmymeasure
Re: Role of gravity in a supernova explosion
Date: 2020-08-10 12:51 pm (UTC)Regarding "why brother", already told you: they are born very similarly. What makes someone your brother? Common parent. Here too, black holes and neutron stars have a common parent, a big collapsing star.