A single teaspoon of neutron star material would weigh about four billion tonnes on Earth — roughly the mass of a mountain — because the star has crushed the equivalent of the Sun into a sphere the width of a city

Neutron stars crush more mass than the Sun into a sphere the width of Manhattan, producing matter so dense a single teaspoon would weigh about four billion tonnes on Earth — the mass of a small mountain range in the volume of a sugar cube. The post A single t…