Knowing very little about the nature of water, wondering how it might behave at the centre of a planet or centre of an another massive gravitational body.
Could water take such pressures or might it break into separate hydrogen and oxygen to find something more accommodating for the pressure exerted, if such atmosphere would allow the volume even?
Finally, bonus points: could triple points in water play a role in keeping temperatures low under high pressures via fluid thermodynamics, ultimately leading out of two jets at the poles, forcing itself into an efficient helix leading back to the surface?
Would it be physically possible that the earth could sustain itself with water at it's core?
Update: This question has been asked and answered. The answer is possibly. At least according to: Physics Question 1 and Physics Question 2
I'm just surprised that if it's true Earth can be supported by a water core, via exotic ices at super high pressures, that the community didn't jump to any conclusions. Better to leave such to philosophers, eh? ;)