I think the proper term is circumstellar habitable zone. If there is other life out there, why are we assuming that it’ll have the same basic needs as our animals? The universe is seemingly infinite, and there’s endless possibilities of what’s out there, so why do we only consider planets that are the ‘perfect’ distance away from their star?
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I think it’s based on the fact that we are carbon life. So all the planets we see that we deem “habitable” is solely based off of that idea. Carbon based life nurturing habitats. I’m sure scientist in that field probably dream of other elemental based life forms. It’s also safe to assume, that since were carbon based, there’s gotta be more similar to us as well.
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