When using a broader scientific definition that includes subsurface environments, how many potentially life-supporting environments are currently identified in our solar system?
Answer
At least three (Earth, Europa, and Enceladus)
While Earth is the only confirmed habitable world, the broad scientific view recognizes the subsurface oceans of Europa and Enceladus as high-priority targets possessing necessary ingredients for life.
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Scientists Discover Planets More Habitable Than Earth - YouTube
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