how many planets are there that we have found outside the solar system?

Question: how many planets are there that we have found outside the solar system?
- Keywords:
  planet,
  solar system
Asked by Izzie to Chris on 22 Jun 2016.
- Chris Hackett answered on 22 Jun 2016:
  
  thousands of exoplanets (planets orbiting other suns) have been discovered using a satellite called kepler. There are probably billions more that we cannot see.

Question: how many planets are there that we have found outside the solar system?