@arnold5

Neutron Stars: The Dense Remnants of Exploded Stars When a massive star explodes in a supernova, it leaves behind a neutron star, an incredibly dense object. A neutron star is so compact that a single teaspoon of its material would weigh billions of tons. Neutron stars are formed when the core of a star collapses, causing protons and electrons to combine and form neutrons. The result is a stellar remnant with a mass greater than the Sun but with a radius of only about 10 kilometers. Neutron stars have some of the most extreme conditions in the universe. They rotate incredibly fast—some spin hundreds of times per second—and emit beams of radiation, known as pulsars, as they rotate. These pulsars are incredibly precise, and astronomers use them to study a variety of phenomena, including the effects of gravity. Neutron stars also have intense magnetic fields, and some are even capable of producing high-energy bursts of radiation.

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