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How Earthly Atomic Nuclei Reveal the Size of Neutron Stars ⚡ экспресс

Original: "Universal relation between dipole polarizability of finite nuclei and neutron-star compactness"
arXiv:2601.16894 · 2026-01-23 · CC BY 4.0 · ⏱ 1 min · Nuclear Theory High Energy Stellar Nuclear Experiment
By measuring how easily atomic nuclei deform, scientists pinned down a neutron star's radius with kilometer precision.
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A tiny atomic nucleus, measurable in a lab, tells us about the size of a neutron star thousands of light-years away. Scientists found a universal link: the easier it is to deform a lead nucleus, the softer the matter in a neutron star and the smaller its radius. It's like learning the hardness of an invisible object by squeezing a spring on Earth.

🎯 Due to the monstrous gravity of a neutron star, its surface is almost perfectly smooth: mountains there can't be taller than a few millimeters — any bump gets instantly crushed.

🎬 In the sci-fi novel 'Dragon's Egg', a civilization is described living on a neutron star, where time flows thousands of times faster than on Earth.

Scientists
Emmy NoetherEnrico FermiPaul DiracWolfgang PauliSubrahmanyan ChandrasekharJocelyn Bell Burnell
Tags
neutron star supernova pulsar Standard Model
Laws
Noether's theoremFermi–Dirac statisticsspin–statistics theoremFermi's golden ruleChandrasekhar limitFermi acceleration
Original: arXiv:2601.16894 · CC BY 4.0 · bridge42worlds