Can H2O Form Without an Atmosphere?

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SUMMARY

H2O can indeed form without an atmosphere, primarily through processes occurring in interstellar space. The formation of water in space is attributed to events such as novae and supernovae, which contribute to the presence of ice comets. These comets are believed to have delivered significant amounts of water to Earth, rather than water being produced from outgassing from the Earth's core. This understanding is supported by historical data and articles, including those found on Wikipedia regarding the origin of Earth's oceans and atmosphere.

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Can H2O form without an atmosphere?
 
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Define "form", define "without an atmosphere" - while it may seem obvious to you what you mean, question is very ambiguous.

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methods
 
Last edited:
Herkeybird said:
Can H2O form without an atmosphere?

Well, there's a lot of interstellar water, most of which probably formed out there in space (novae? supernovae?) That's the likely source for much of the early water on Earth: ice comets raining down upon Earth (as opposed to stuff 'outgassing' out of the Earth's core). Unfortunately, I can't find a good source for this last assertion, beyond what I remember and the Wikipedia article:
http://en.wikipedia.org/wiki/History_of_the_Earth#Origin_of_the_oceans_and_atmosphere
 

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