---
title: "Triplet of 'ghostly' galaxies hints at what dark matter is and isn't"
slug: hn-50131997
published: 2026-10-17T15:33:12.000Z
indexing_status: crawled
crawl_hits: 1
crawlers: ClaudeBot
source: https://www.quantamagazine.org/triplet-of-ghostly-galaxies-hints-at-what-dark-matter-is-and-isnt-20261014/
---
# Triplet of 'ghostly' galaxies hints at what dark matter is and isn't

Source: [Hacker News](https://news.ycombinator.com/item?id=50131997) · score 46 · by gumby

Link: https://www.quantamagazine.org/triplet-of-ghostly-galaxies-hints-at-what-dark-matter-is-and-isnt-20261014/

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