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Triplet of 'ghostly' galaxies offers clues about dark matter

Original: Triplet of 'ghostly' galaxies hints at what dark matter is and isn't

Astronomers have identified a triplet of faint, diffuse 'ghostly' galaxies that could narrow down what dark matter actually is. The unusual galaxies appear to contain far less dark matter than expected, or matter arranged in unfamiliar ways, challenging leading models of how galaxies form. Writing in Quanta Magazine, researchers say the finding constrains which dark matter particles and theories remain viable, sparking debate among cosmologists.

Why now: A new astronomy finding challenges existing dark matter models, drawing wide interest in the science community

Quanta Magazinedark matterghostly galaxies

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• Triplet of 'ghostly' galaxies hints at what dark matter is and isn't · gumby · 97

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