Question

What are black holes, white dwarfs, and neutron stars?

Answer 1

This are because due to the change in the temperature of star and for making black hole,white dwarf and neutron star it depends on its mass

Answer 2

Answer:

white hole is a hypothetical region of spacetime and singularity which cannot be entered from the outside, although energy-matter, light and information can escape from it. ... White holes appear in the theory of eternal black holes.