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  "path": "/science/166653-neutron-stars-pulsars-cosmic-lighthouses-dead-stars/",
  "publishedAt": "2026-05-07T11:40:00.000Z",
  "site": "https://english.pravda.ru",
  "tags": [
    "Science"
  ],
  "textContent": "When massive stars reach the end of their lives, they do not simply fade away. Some die in colossal supernova explosions so powerful that, for a short time, they can outshine entire galaxies. What remains after such a cosmic catastrophe can become one of the strangest and most extreme objects in existence — a neutron star.\nA neutron star forms when the core of a massive star collapses under its own gravity after the supernova explosion. Despite being only around 20 kilometers across — roughly the size of a large city — such an object can contain more mass than the Sun.\nThe density of a neutron star is almost impossible to comprehend. A single teaspoon of its matter would weigh billions of tons on Earth. Under such conditions, atoms themselves collapse, and protons and electrons merge into neutrons, creating an object composed almost entirely of ultra-dense nuclear matter.",
  "title": "Neutron Stars and Pulsars: The Extreme Physics Behind Cosmic Radiation Beams"
}