What are the chances ?

Life, at least on our world, is an extraordinarily resilient and hearty thing. You can go miles into the earth’s crust and find living microbes. You can journey to the frozen poles - that in some ways mimic the harsh conditions on some of the other world’s in our solar system - and you’ll find life thriving. Even if our world were to undergo almost every natural or manmade cataclysm in the book, some form of life would likely survive. Only the eventual death of our sun seems to be a surefire way of life on earth giving up the ghost. So what are the chances of life outside of the earth in our solar system?"