It Appears That Enceladus is Even More Habitable Than we Thought -
So while hanging out with Goldilocks is a nice bonus for habitable worlds, it isn’t necessary. You just need a thermal energy source that can keep your water wet. And since water is more abundant in the outer solar system, it’s quite possible that life is far more common on the moons of gas giants than it is on Earth-like worlds. But water isn’t enough for life to survive.
When the Cassini spacecraft was orbiting Saturn, it captured lots of data on several of its moons, including observations of water plumes coming from Enceladus. These plumes contained plenty of organic compounds, though phosphorus wasn’t detected. But a team studying Enceladus thought phosphorus was likely there. So they created a geochemical model including thermodynamic and kinetic behavior, and match their model to the Cassini observations.
Of course, these findings add just one more key to the puzzle of life elsewhere. We still have no evidence of life on Enceladus, but given this latest study, it might be worth sending a probe to Saturn’s moon to find out.
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