Are there other conscious-minded creatures on another planet or solar system?
It is highly likely. Yes. Do we know for sure? No.
We have no proof as of date of any life outside our tiny little Earth. We don’t even have any evidence of past life from anywhere other place than Earth.
Will we ever know? We hope so. Our best chance is finding some microbes on Titan or some other moon in our solar system. That would be a huge revelation!