Neutron stars

   We know that in some supernovae strong gravity supergiants in the bowels causes the electrons to fall on the nucleus, where they merged with the protons, neutrons form. Electromagnetic forces separating adjacent nuclei, are disappearing. The core of the star now is a dense ball of atomic nuclei and some neutrons.

   These stars, known as neutron stars are extremely small - less than the size of a large city, and have the unimaginable density. During their treatment becomes extremely small as reducing the size of the star (due to conservation of angular momentum). Some make 600 revolutions per second. When the axis connecting the north and south magnetic poles of the rapidly rotating stars, points to the Earth, you can record the radiation pulse, repeated at intervals equal to the period of the star. Such neutron stars are called pulsars, and became the first open-neutron stars.