I recently tuned in on a TV program about space and one planet presumably outside our solar system is covered with water several miles deep with no land in sight. It was suggested that under high pressure, the water molecule take on an order similar to some transluscent solid material that the narrator was holding.  Is that possible? since we were all told that water was nearly incompressible.

Has anyone seen this show as I would like to know the name of this planet and where it is located? No, I dont intend to go there at least not in this lifetime.