Neutron stars are the densest objects in the universe that are not black holes, formed when massive stars collapse after supernova explosions, crushing protons and electrons into neutrons; a single teaspoon of neutron star material weighs approximately 900 million tons, and these stars can spin up to 700 times per second while emitting radiation beams across the galaxy.
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A Teaspoon of Neutron Star Would Weigh a Billion Tons π€―Added:
A neutron star, one teaspoon of its material weighs 1 billion tons. That's heavier than Mount Everest. When a massive star collapses, it crushes into a ball just 20 km wide, but it keeps the mass of the entire Sun. It spins up to 700 times per second, shooting beams of radiation across the galaxy. It is the densest thing that exists without being a black hole. Space is insane.
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