have you ever seen black hole or a supernova

Question: have you ever seen black hole or a supernova
- Keywords:
  black hole,
  supernova,
  universe
Asked by anon-208363 to Hannah on 5 Mar 2019.
- Hannah Dalgleish answered on 5 Mar 2019:
  
  Nope, it’s actually impossible for anyone to see a black hole, because they are invisible! I also don’t know of a supernova ever actually being observed, astronomers have only seen supernovae after the explosion has actually happened.

Question: have you ever seen black hole or a supernova