That would be a sphere of water with radius <0.25AU: http://www.wolframalpha.com/input/?i=1.3+billion+cubic+kilometres+*+140+trillion http://www.wolframalpha.co

That would be a sphere of water with radius <0.25AU: http://www.wolframalpha.com/input/?i=1.3+billion+cubic+kilometres+*+140+trillion http://www.wolframalpha.com/input/?i=1.3+billion+cubic+kilom... (Ocean volume figure is from http://en.wikipedia.org/wiki/Ocean http://en.wikipedia.org/wiki/Ocean )