And because the water molecule is frequently occurring, there is a reasonable probability that it applies to all planets in the Milky Way. Using a computer model, Anders Johansen and his team have calculated how quickly planets are formed, and from which building blocks. Earth then grew faster and faster until, after five million years, it became as large as we know it today. If, on the other hand, it was random how much water was present on planets, the planets might look vastly different. Source: The Milky Way may be swarming with planets with oceans and continents like here on EarthCategories: Misc....