Isn't it possible for bacteria to accidentally be transported from earth to one of the moons if we send a satellite there? After all, bacteria can be quite resistant. I am not saying it is likely, but merely a possibility. Anyways, I think it would be cool to put some organisms from earth there and see if they could survive and the ones that would survive could evolve into new forms of life. it would be cool to watch
Things that are sent to space are specially cleaned and checked. There's no way for it to piggyback a satellite along into space. And its not advisable to do something which no-one can guarantee the results, especially of this kind. What if it goes REALLY wrong?