Question

How many planets do we have within our solar system? How many have been discovered in the galaxy?

Answer 1

We have 8 planets in solar system.

Explanation:

Planets other than solar system planets we call them exo planets. as per Wikipedia" As of August 1, 2017, astronomers have identified 3,639 such planets (in 2,729 planetary systems and 612 multiple planetary systems).[1] This is a list of the most notable discoveries:"
For details and numbers discovered by Each method see this link.https://en.wikipedia.org/wiki/Discoveries_of_exoplanets