Amateur question incoming so please bear with me.


If a black hole is born from a star going supernova, intuitively it should have the same or less mass compared to the star.

Black holes visually appear black because light cannot escape them due to their mass.


  1. Wouldn't that imply that the light should not be able to escape the original star? Creating a black star that is visually indistinguishable from a black hole?

  2. If so, would it also mean that all stars capable of becoming black holes are themselves black stars before going supernova?

  • $\begingroup$ You are missing one thing. It is not due to their mass. You need to look at mass in a region. Squeeze mount everest down to the size of a proton and you probably also have a (tiny) black hole. $\endgroup$
    – Hennes
    Mar 23 '19 at 13:18
  • $\begingroup$ @Hennes that does make a lot of sense! $\endgroup$ Mar 23 '19 at 16:58