You could also attempt to explain to river that stellar remnants depend on the mass of the star...Small yellow dwarf stars like the Sun, leave behing White Dwarfs....larger more massive stars leave behind Pulsars/Neutron stars, and even bigger stars leave behind BH's as EDP and NDP that hold up White Dwarfs and Neutron stars from further collapse, are overcome.
What form of matter can ever " collapse " ?
BH are thought to form all galaxies. The center of all galaxies . Upon what energy and matter is it based on ?
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