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Old 09-28-2009, 10:15 AM   #19 (permalink)
Raghnar -ITA-
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Location: Milan - Italy
Quote:
Originally Posted by BadNick View Post
Hydrogen is by far the most abundant element in the Universe, and oxygen is formed inside stars so when they explode in a supernova they "rain" the elements that can eventually make up water all over the place. Is that an erroneous description?
Not nececcary a Nova, when every normal star die is made of elements lighter then Iron, Oxigen included. And when a star in form of Red Giant burn Carbon it makes Oxigen that can be spread across the universe with solar wind.
At the end of the evolution of this kind of star will form a nebula, rich of Carbon and Oxigen, that evetually re-aggregate to form a solar system.
In fact is much more usual that oxigen comes from "Principal Sequence" stars (like the Sun and from 0.1 lighter to 10 times heavier then the sun), then from Novas.

Novas are the only way that universe have to make great quantities of heavier-then-Iron elements, and spread it across the galaxy when expolde.
In fact, all the gold you have and you carry in yours ring and necklaces once upon a time was part of a brilliant, shiny, Nova. (Saying this when gifting a gold this to a woman have guarateed effect, unless the woman is an astrophysicist like my girlfriend )
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