As far as I'm concerned, no planets outside of our solar system have actually been found. None have actually been seen but rather are said to be there based on anomalies like flickering light from the star or other things. I really shake my head when they try to tell us what they are composed of. There is no way they could know that. Just think about how many things we had been told about the planets in our system had to be revised when instrumented probes actually went there and took pictures and measurements. There may be other planetary systems but until someone or something with a camera goes there, it won't be conclusive to me.