The Evolution of the Baryons Associated with Galaxies Averaged over Cosmic Time and Space · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/2009.11126/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTThe Evolution of the Baryons Associated with Galaxies Averaged over Cosmic Time and Space — mentioned by pfdietzhttps://news.ycombinator.com/item?id=39345023urn:hackerpapers:mention:2009.11126:39345023Mon, 12 Feb 2024 14:20:04 GMT<p>That&#x27;s true, but the star formation rate peaked around Z = 1.5, which was long before the solar system formed. By the time our solar system formed the rate was maybe 1/4 of the peak, and has fallen since. https://arxiv.org/pdf/2009.11126.pdf I don&#x27;t think it&#x27;s a reasonable assumption that the rate of life (or civilization) formation would remain constant on a planet around a red dwarf over extended periods of time. I don&#x27;t think Earth could survive for trillions of years as a life bearing planet, even with a more long lived star. Without radioactivity and primordial heat, plate tectonics…</p><p><a href="https://hackerpaper.kaipfister.de/p/2009.11126/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph.GA