If the sugar cube has the density Since neutron stars began their existence as stars, they are found scattered throughout the galaxy in the same places where we find stars. Neutron stars are made of neutronium which is neutrons packed shoulder to shoulder by intense gravity and has a density in the neighborhood of 10^17 Kg/m^3 which is about 2 billion tons per cubic inch. A neutron star is the collapsed core of a giant star, which before collapse had a total mass of between 10 and 29 solar masses.Neutron stars are the smallest and densest stars, excluding black holes and hypothetical white … The smallest a neutron star can possibly be is about 20 km (12.5 miles) in diameter, but it boasts a mass of almost 1.5 times the mass of our sun, possibly up to 3.5 solar masses! Compare this to The neutron star, called J0740+6620, has been classified as a 'pulsar.' This basically means it emits a beam of radio waves from each magnetic pole like lighthouse beacons. One sugar cube of neutron star material would weigh about 1 trillion kilograms (or 1 billion tons) on Earth – about as much as a mountain. A neutron star has a density 3 E^17 kg/m^3. One sugar cube, according to Yahoo answers, is half an inch (1.27 cm) long per side. Read more in Sun.org´s article. TIL that a neutron star is so dense that if an object was dropped from one meter above the star's surface, it would hit the surface at a speed of 7.2 million km per hour The numbers that are referenced are so beyond far beyond Which makes the volume of the sugar cube to be 2.05 E^-6 m^3. An object so dense that one tiny sugar cube of it weighs more than all human beings put together is definitely worth a closer look.