What is the difference in life cycles of a star that starts with a nebula and forms a black hole when in dies compared to a star that ends as a black dwarf?

1 Answer

stars with mass upto 1.4 times sun become white dwarf.


stars with 10 or more solar mass become neutron star or balck hole.
Stars below chandra sekhar limit when hydrogen burning is finished pull of gravity get reduced and become first red giant. .Later outer layers are puffed out to form planetary nebula. THe core become a white dwarf by shrinking in size and increasing in density.
Stars with 10 ,or higher solar mass when hydrogen is finished first become red giant .explodes in supernova. and forms black holeenter image source here
picture cyberphysics co,UK.