Now that there is proper context, it makes sense that water could not have condensed in the inner solar system, simply because it was too hot and the water would have vaporized. However, there is no problem with water condensing in the outer solar system. Here lies the basis of the water-comet theory: When the solar system was still early in its age and gravitational interactions were forcing collisions between bodies, an H2O-abundant comet reached Earth and crossed its orbital path, thus colliding with it. It also could have been multiple asteroids that delivered the goods, but regardless, the result is the same and the reasoning is sound. The purpose of this post is this: recently, new evidence for asteroids carrying water in other star systems has solidified the theory's ideas. "In observations obtained at the William Herschel Telescope in the Canary Islands, the University of Warwick astronomers detected a large quantity of hydrogen and oxygen in the atmosphere of a white dwarf (known as SDSS J1242+5226). The quantities found provide the evidence that a water-rich exo-asteroid was disrupted and eventually delivered the water it contained onto the star." This is profound because it proves that other systems also have asteroids that carry high volumes of water, and it most likely isn't a single case!
