Neutron stars are formed when a massive star runs out of fuel and collapses in on itself. The core of the star collapses, crushing together ever proton and electron into neutrons. These newly-created neutrons can stop the collapse leaving behind a neutron star! This collapse leaves behind the most dense object known – an object with the mass of a Sun squished down to the size of a city!! Neutron stars can spin 60 times in a second because they are specific types of stars that are able to spin at very high speeds and emit radiation. This is what a neutron star is!!
