How Comets Revealed Dark Matter's Secret ⚡ экспресс
Original: "The Oort Cloud as a Gravitational Detector for Primordial Black Holes"
The gravity of invisible black holes can nudge comets at the edge of the Solar System, allowing us to estimate their share in dark matter.
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Invisible black holes as massive as a thousand Suns can scatter comets in the Oort Cloud like pins. If all dark matter were like that, we'd see far more comets. But there are few — so heavy black holes are only a tiny part of the invisible.
🎯 The outer edge of the Oort Cloud lies about one light-year from the Sun — a quarter of the distance to the nearest star, Proxima Centauri.