It is not absolutley definate that there is life on the other 7 planets as no one has travelled farthar than the Moon. They were thinking of sending robots upto Mars to see if there was any life there or if it was just possible to live there at all. If there is life then that will help us alot considering climate change happening so we could move there ASAP. It is said that there is a goldilocks zone somewhere out there and it is our job to find it. A goldilocks zone is a zone where people can live in space, on a planet without being on earth. We have already visited the moon but now we need to search the other 7 planets. The goldilocks zone could be just on Mars or it could be in another galaxy, we will not know until we search on the other nearbye planets!
If I were to take a guess then I believe that there is a goldilocks zone somewhere out there, but we may never find it. As I said before it could be just round the corner, or it could by unfindable!
The big question is: Is there life on the other 7 planets ?