The dispersion of the stellar material
The Crab nebula is the remnant of a supernova explosion that occurred 6000 years ago in our galaxy and that has been observed on Earth in 1054 by Chinese astronomers and Navajo. The supernova phenomenon is due to the explosion of a big star at the end of life. During such explosions are produced by a rapid succession of neutron captures, elements heavier than iron, such as platinum, gold or uranium. These elements are dispersed by the explosion in the galactic space.