Fact #32
July 2, 2026A Sugar Cube of a Neutron Star Would Weigh About a Billion Tons
Although a neutron star is only about 20 kilometers (12 miles across), it can contain more mass than the Sun. Neutron stars are so dense that a single sugar cube sized piece of neutron star material would weigh roughly a billion tons on Earth.
Mini Facts
1
They form after massive stars run out of fuel and explode as supernovae.
2
Many neutron stars spin incredibly fast, with some rotating hundreds of times per second.
3
Their gravity and magnetic fields are among the strongest known in the universe.
4
With an average size of 20 km (12 miles) wide, this is roughly the size of a city.