Before I get started; Pluto is a planet, material having achieved hydrostatic equalibrium, has a set orbit around Sol, and even has a natural satellite.
Just thinking about Earth. One of 9 planets (old school learning) in The Solar System. Then count in the other 'bodies'. Roughly 190 moons, uncounted asteroids, uncounted Kepler Objects and then there are the comets. Add to that the cooler I launched in to orbit several years ago and you have a large number or places that could harbor life. As technology flourishes, develops and grows we now know more about the space around us and to this day have not found life (as we know it) on another celestial object. Facts may be a bit skewed; but please bare with me. Our closest neighbor (apart from our natural satellite Luna) Would be Venus. A bit closer to Sol, so if all had worked out right it would be a bit hotter than Earth. But; things didn't turn out right, the oxygen escaped the atmosphere, the heavier gases remained and ended up with a severe greenhouse effect. Scientist say the surface temperature on Venus is hotter than Mercury (#1 of the first 3 planets). Our other close neighbor would then be Mars. So this planet is set up a lot like Earth, rocks and dust, a molten core, tectonics and even a reasonably close Ph balance in the soil there. There is even a little water there; in the form of ice. Mars being further from Sol than Earth, is like a perpetual winter. Seasons being Cold-Colder-More Cold and Coldest. Would make a nice ski lodge calendar. I will at this point say; for sake of argument, of the first 3 planets Earth ended up in the only place temperate to support life. This location is, in fact so exact there are places on Earth that are too cold to support life (as we know it). Which does bring me to the subject of Per chance happening or is there Intelligent design? Food for thought.