how do you know so much about black holes

Question: how do you know so much about black holes
- Keywords:
  black holes,
  experiments,
  research
Asked by luckyleiharna12345 to Manolis on 12 Mar 2014.
- Manolis Rovilos answered on 12 Mar 2014:
  
  It requires a lot of studying of Physics… Also, sometimes we need to go to the telescope to see that what we predict form the Physics equations actually happens in the sky.

Question: how do you know so much about black holes