https://hackerpaper.kaipfister.de/p/2007.10722/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=34896477urn:hackerpapers:mention:2007.10722:34896477Wed, 22 Feb 2023 14:53:39 GMT<p>The &quot;black holes as dark matter&quot; were termed MACHOs (massive astrophysical compact halo object) https://en.wikipedia.org/wiki/Massive_compact_halo_object Most of that has been ruled out (see the graph on http://resonaances.blogspot.com/2016/06/black-hole-dark-matt... ) and while some black holes may fall into the dark matter category, the observed &quot;if there were that many black holes, micro lensing would be this common...&quot; The result of those tests constrains black holes to less than 1% of the calculated dark matter... though there are some windows where there is very likely active research…</p><p><a href="https://hackerpaper.kaipfister.de/p/2007.10722/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph.CO