A Teaspoon of Neutron Star Material Weighs 1 Billion Tons

Neutron stars are among the densest objects in the universe, second only to black holes. These collapsed cores of massive stars are so incredibly dense that a single teaspoon of neutron star material would weigh approximately 1 billion tons on Earth. To put this in perspective, this is equivalent to the weight of about 900 Great Pyramids of Giza, or roughly 150 million elephants. A neutron star with a diameter of just 20 kilometers typically contains more mass than our entire Sun. This extreme density is achieved because neutron stars are composed almost entirely of neutrons packed together so tightly that they're essentially one giant atomic nucleus. The gravitational force on a neutron star is so strong that if you could somehow stand on its surface, you would weigh about 200 billion times more than you do on Earth.