why are black holes so big – I'm a Scientist 25/26

Question: why are black holes so big
- Keywords:
  black hole,
  space
Asked by fast1jete on 18 Sep 2025.
- Sandra Raimundo answered on 18 Sep 2025:
  
  Black holes are very massive but they are not always very big. Some black holes are less than 100 miles across.
- Emily Walls answered on 18 Sep 2025:
  
  The size of a black hole depends on how much mass it has, the more mass it has, the larger the event horizon is. The event horizon is where the boundary is before nothing can escape it not even light.