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A comment on Ask HN: What’s the most important modern simple invention?. Parent comment

Re:Ask HN: What’s the most important modern simple invention? by frutiger on Tuesday February 11, 2020 @04:39PM (#22303174)
This is a common misconception. Intergalactic space is filled with about half of the matter in the universe. See: https://en.m.wikipedia.org/wiki/Warm–hot_intergalactic_mediu...

As to your original point though, there doesn’t appear to be too many elements here apart from ionized hydrogen and hydrogen.

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Re:Ask HN: What’s the most important modern simple invention? by rriepe on Wednesday February 12, 2020 @09:21PM (#22314798)
Great point. I almost missed this. It really seems like there should be another separation in the article I linked, between "Universe" and "Milky Way."
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