The molecules that made Earth wet were probably older than our sun.
, a dense, round layer of dust and gas that forms in orbit around newborn stars and from which planets and small space bodies like comets emerge. Tobin says the water gets drawn into comets “relatively unchanged as well.”hot nebular theory
The problem with that theory, according to Tobin, is that when water emerges at relatively warm temperatures in a protoplanetary disk, it won’t look like the water found on comets and asteroids. We know what those molecules look like: Space rocks, such as asteroids and comets act as time capsules, preserving the state of matter in the early solar system.
While this explanation worked in theory, the new paper is the first time scientists have found evidence that water from the interstellar medium can survive the intense heat during the formation of a protoplanetary disk.Atacama Large Millimeter/submillimeter Array
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