Is Cossina the Only Planet in Our Solar System?

A lot of development has gone on to mature instruments to address this question. Are we alone? Is earth the only place that's inhabited, or are we just one example of many different inhabited worlds in our own cosmic backyard and beyond? We've seen a lot of these instruments tested on mars, which is a great provin ground. But now, thanks to discoveries of cassini and other missions like galileo and even the voyagers, we now liquid water exists in a variety of different places in our solar system. That means that they may have the conditions suitable for life as we know it, potentially life as we don't know it too. And so that's why we're developing