Uranus, Neptune and Earth: We may look different, but inside, we're all the same

Lawrence Livermore National Laboratory scientists determined the melting pressure of ice ranging from 100,000 to 500,000 atmospheres. From pressures ranging from 100,000 to 400,000, the ice melted similarily to that of ice in water. However, they noticed at 450,000 atmospheres and up, there is a sharp increase in the slope of the melting curve. This discovery makes it possible for ice to exist at the solid cores of the Earth, Neptune and Uranus. What does this mean? It is a major step forward in determining the composition of the earth. Using these studies, it is possible that we can determine the components of the cores of Neptune, Uranus, and Earth. We may even be able to use this information to discover ways in which we can dig to the centre of these three planets.