Neutron stars are so dense that a teaspoon of their material would weigh about 6 billion tons on Earth—as much as all humanity combined.
Notes on verification
Standard astrophysics calculation based on measured neutron star densities
Neutron stars are so dense that a teaspoon of their material would weigh about 6 billion tons on Earth—as much as all humanity combined.
Standard astrophysics calculation based on measured neutron star densities