Why can a narrow belt in space be conductive to life?

It is really a question of conditions. Where that belt might be in relation to the star depends on the star itself. It is often called "The Goldilocks Zone" i.e. not too hot and not too cold. Different authorities give slightly varying distances for our Goldilocks Zone. The one thing we know is that the Earth is in it. This is the region where water will not evaporate away, or freeze entirely, but will remain largely liquid. Water is essential to life as we know it, because it is the best solvent for carbon, another essential ingredient. We can conceive of other chemistry's forming life, but nature has a habit of taking the easy way out, so we feel other bases for life to be unlikely.|||Because there, stellar light has such a density that a planet located within that belt will have a stable temperature (the warmer the planet gets, the more it emits, and therefore, a balance is formed at a certain temperature) between 0C and 100C.


Since liquid water has many unique properties, and is very capable of transporting chemicals without damaging them, and is so common, and can coexist with complex molecules, presumably carbon-based ("organic"), we assume that life can only exist if there is liquid water.|||might be baldylocks zones,were life could evolved anywhere it can