Michio Kaku spoke of this in his last book, which was an amazing read speculating this idea. If there is life on these planets, and the inhabitants originated from the same planet, the chance of them sharing any compatibility with humans would be quite inconceivable.
Edit: What system is this in? Do you remember what the description said in the map?
This was the description


I'm keeping the exact location to myself until I've traded in the exploration data!