Name: The Incredible Density of RX J1856
Uploaded: 2025-11-24T20:06:47.166Z
Description: Learn how the RX J1856 neutron star packs more mass than the Sun into the size of a city and why it is one of the densest objects in the known universe.

Learn how the RX J1856 neutron star packs more mass than the Sun into the size of a city and why it is one of the densest objects in the known universe.

## Understanding the RX J1856 neutron star RX J1856.5-3754 is one of the closest neutron stars to Earth, and it challenges much of what we know about stellar physics. This object is the remnant of a massive star that went supernova, leaving behind a core so dense that ordinary matter simply cannot exist. When a star this size collapses, the gravity is so intense that protons and electrons are crushed together, leaving nothing but a solid ball of neutrons. It is effectively a cosmic city made of tightly packed particles spinning faster than a jet engine. Here is what makes this specific neutron star so unique: * It contains more mass than our entire Sun while being only about 12 to 14 miles wide.
* The surface gravity is roughly 100 billion times stronger than what we feel on Earth.
* It possesses a magnetic field capable of wiping electronic data from millions of miles away.
* Astronomers believe these stars could remain glowing long after every other light in the universe has gone out. While it may look like a simple point of light in a telescope, the RX J1856 neutron star represents the absolute limit of density before an object turns into a black hole.

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Fraternità cappuccina nel cuore di Milano

Преди да се върнеш, спомни си

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