How many solar systems are there? I only know 2?

there is only one solar system, which is ours. there are many hundreds of exoplanet systems discovered though

There have been over a thousand exoplanets discovered, and nearly a thousand confirmed, orbiting other stars. This research s continuing and new exoplanets are discovered all the time. So, I'd say there are hundreds if not thousands of planetary systems out there around other stars that have been discovered already. We should not call them solar systems since they are other stars, not ours (called Sun or Sol). Do a search for "exoplanet" ..

Go out and look at the sky on a clear night and see how many stars are in the sky. Most of them have planets (and therefore are solar systems). It turns out from the Kepler mission that planets orbitting stars is the norm rather than the exception.

It's classically been estimated that about 10% of stars have planets, which would mean about 20 billion solar systems in our galaxy.

Around a googol.

i don,t known How many solar systems have scientists discovered yet( may be more then 100), but i known how many solar systems in galaxy (999999999989899889889999998989898898989... =???? how many solar systems means, it un countable

Millions or maybe "BILLIONS".