A low guess for the extrapolated universe is 10 to the 24th power solar systems with planets, or 1,000,000,000,000,000,000,000,000, or a trillion trillion.
These are solar systems mind you, take that into account and think about how many planets are within those solar systems.
The likelihood of there being planets with atmospheres similar to ares is quite high, therefore making the possibility of biological life being there as well.
Nasa found one back in 2015 called Kepler-452b
info about this planet ......
https://en.wikipedia.org/wiki/Kepler-452b