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Timeline for Mass of All the Neutrinos

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Aug 10, 2021 at 18:05 comment added ProfRob @JerrySchirmer Correct - I have put this in. Though these neutrinos are not the products of primordial nucleosynthesis.
Aug 10, 2021 at 18:04 history edited ProfRob CC BY-SA 4.0
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Aug 10, 2021 at 16:40 comment added Zo the Relativist I guess an aside for this would be ALSO calculating neutrino production during the "CMB was still fusing hydrogen into helium" era, but even there, you're at something like, at the most, "1% of the 20% of baryonic matter that became helium and heavy elements" as your "biggest possible" estimate.
Jul 27, 2021 at 9:55 history edited Peter Mortensen CC BY-SA 4.0
Copy edited (e.g. ref. <https://en.wikipedia.org/wiki/Big_Bang>). Removed historical information (that is what the revision history is for) - the answer should be as if it was written right now.
Jul 27, 2021 at 1:39 history edited ZeroTheHero CC BY-SA 4.0
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Jul 26, 2021 at 15:15 history edited ProfRob CC BY-SA 4.0
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Jul 26, 2021 at 14:58 comment added ProfRob @DanielDarabos yes, that is a good source and most of the numbers are still pretty accurate. I will include.
Jul 26, 2021 at 14:04 comment added Daniel Darabos Great answer! I didn't realize stars were a small part of baryonic matter. I eventually found "The Cosmic Energy Inventory" (2004). Looks like it's a good resource to support this answer. iopscience.iop.org/0004-637X/616/2/643/fulltext/60693.text.html
Jul 26, 2021 at 13:34 comment added Shufflepants While this answer provides several rough estimates of percentage compositions, maybe it could be improved by putting these rough estimations together for a "back of the envelope" final calculation of the total percentage of the rest mass of the visible universe that neutrinos make up.
Jul 26, 2021 at 7:14 comment added ProfRob @lurscher the question asks about neutrinos emitted by stars. But we can clarify.
Jul 26, 2021 at 2:25 comment added lurscher Very good answer. Something that is not covered in this answer is the possibility of primordial neutrinos
Jul 25, 2021 at 19:23 history answered ProfRob CC BY-SA 4.0