https://hackerpaper.kaipfister.de/p/2101.12220/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=31170696urn:hackerpapers:mention:2101.12220:31170696Tue, 26 Apr 2022 17:48:30 GMT<p>Although it&#x27;s great that it&#x27;s provoked you into asking questions, it seems like there is a lot that the PBS video must not be placing into your mind, like how these asteroid size masses are moving with respect to some local standard of rest in their region of the galaxy (and how commonplace they are) are crucial to the idea. If they&#x27;re moving gently along with all the stars in their neighbourhood, collisions between these asteroid-mass black holes and anything appreciable is unlikely (just as star-star collisions are very rare) that we wouldn&#x27;t expect to see that ever happen. Wandering pretty…</p><p><a href="https://hackerpaper.kaipfister.de/p/2101.12220/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph.HE