The other day, in the TPBM thread, knowmad and I had the
following exchange: catinthefunnyhat wrote:TPBM thinks it would
be cool if there was a planet that was water all the way
through... just a big ol' drop of water with ice or whatever it
would be at the core, liquid at the surface, and a vapour
atmosphere. knowmad wrote:Whoa! Cool! We were talking about this
last night! I have enjoyed imagining such a planet for years,
and wondered whether it would be possible. What would be in the
middle? Water under extreme heat and pressure, so... hot ice?
Viscous steam? I had poked around on the Interwebs a bit and
never found anything. I considered the possibility that such a
planet maybe couldn't exist, because the super-
heated/pressurized water at the centre might just explode, or
something. Anyways, after the above exchange, I decided to
Google it again, just in case things had changed. And lo, what
to my wondering eyes did appear, but a press release from Nasa
this year! http://hubblesite.org/newscenter/archiv ..