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Water comes from Outer Space
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~Mystery~ Offline
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Water comes from Outer Space

Most water on Earth was not actually produced here - it came from space. This is old news for astronomers, but until now water-producing factories had not been observed at work in space. Nor was it possible to trace water at the different stages of its long journey through space. Very little information about cosmic water can be obtained from the ground - primarily because the Earth's atmosphere is itself rich in water vapour and blocks our view of the water in the Universe beyond. ISO helped astronomers to reconstruct for the first time the cosmic cycle of water.

[Image: migration-26783_-1.jpg]

Hydrogen (1.) was originally produced in the Big Bang and is found everywhere in the Universe. Oxygen (2.) is made in stars and dispersed out into the Universe in events such as supernova explosions. The two elements mix in star-forming clouds (3.) and form large amounts of water (H2O). The molecules of water leave the clouds and end up in many different places (4.) - comets, planets the centres of galaxies ... When the newly-born stars become old more oxygen is made available to the cosmic water factory.

First, the ingredients: Hydrogen is the most abundant element in the Universe, and oxygen is produced at the centres of massive stars and dispersed into space by stellar winds or supernova explosions. The ideal conditions for these gases to combine are found in places such as star-forming regions, for example, the Orion Nebula. In 1997 ISO detected large quantities of water in Orion - the most studied star-forming region - and astronomers estimated that the water-production rate in the nebula could fill Earth's oceans 60 times a day. (See also ISO finds steamy cloud in interstellar space)
Some of these newly formed water molecules start to travel out into the cold of interstellar space, where they form ice grains. With time they will end up in comets or in planets like our own. ISO has also detected water in many other regions, including the galactic centre and in both newborn and dying stars.

source

http://sci.esa.int/science-e/www/object ... ctid=26783

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03-08-2011 07:51 PM
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AWOL Offline
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Post: #2
Re: Water comes from Outer Space

This is so incredibly old that I honestly have to wonder whether or not you're trolling or failing at being helpful.

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03-08-2011 08:14 PM
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