<story><title>NASA’s Webb finds carbon source on surface of Jupiter’s moon Europa</title><url>https://webbtelescope.org/contents/news-releases/2023/news-2023-113</url></story><parent_chain><item><author>jychang</author><text>Every once in a while, I get reminded that people don’t necessarily have a scientific background.&lt;p&gt;1. Water molecules are not indivisible, of course. Many biological processes will rip apart hydrogen and oxygen, or combine them back together, and have been doing so for billions of years. Industrial processes do the same. So there’s plenty of “new water” from oxygen in the air, etc.&lt;p&gt;2. New water&amp;#x2F;oxygen&amp;#x2F;hydrogen land on earth fairly regularly due to comets, which are usually slushy balls of ice.</text></item><item><author>dmix</author><text>&amp;gt; a fascinating world with a salty, subsurface ocean of liquid water—possibly twice as much as in all of Earth’s oceans combined.&lt;p&gt;If we brought water back a container of water from Europa would this be the largest amount of new water entering the earth since planets struck it billions of years ago?&lt;p&gt;I briefly googled it (I dont know much about this stuff tbh):&lt;p&gt;&amp;gt; The water on our Earth today is the same water that’s been here for nearly 5 billion years. So far, we haven’t managed to create any new water, and just a tiny fraction of our water has managed to escape out into space. The only thing that changes is the form that water takes as it travels through the water cycle.&lt;p&gt;Anyway interesting thought experiment.</text></item></parent_chain><comment><author>bmitc</author><text>&amp;gt; Every once in a while, I get reminded that people don’t necessarily have a scientific background.&lt;p&gt;This isn&amp;#x27;t necessary for your point and detracts from an otherwise useful clarification.</text></comment>
<story><title>NASA’s Webb finds carbon source on surface of Jupiter’s moon Europa</title><url>https://webbtelescope.org/contents/news-releases/2023/news-2023-113</url></story><parent_chain><item><author>jychang</author><text>Every once in a while, I get reminded that people don’t necessarily have a scientific background.&lt;p&gt;1. Water molecules are not indivisible, of course. Many biological processes will rip apart hydrogen and oxygen, or combine them back together, and have been doing so for billions of years. Industrial processes do the same. So there’s plenty of “new water” from oxygen in the air, etc.&lt;p&gt;2. New water&amp;#x2F;oxygen&amp;#x2F;hydrogen land on earth fairly regularly due to comets, which are usually slushy balls of ice.</text></item><item><author>dmix</author><text>&amp;gt; a fascinating world with a salty, subsurface ocean of liquid water—possibly twice as much as in all of Earth’s oceans combined.&lt;p&gt;If we brought water back a container of water from Europa would this be the largest amount of new water entering the earth since planets struck it billions of years ago?&lt;p&gt;I briefly googled it (I dont know much about this stuff tbh):&lt;p&gt;&amp;gt; The water on our Earth today is the same water that’s been here for nearly 5 billion years. So far, we haven’t managed to create any new water, and just a tiny fraction of our water has managed to escape out into space. The only thing that changes is the form that water takes as it travels through the water cycle.&lt;p&gt;Anyway interesting thought experiment.</text></item></parent_chain><comment><author>jvm___</author><text>Is the water I drink the same water I pee? Or does it get taken apart and put back together with different pieces?</text></comment>