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Chapter 4.2 The Explosion of Super Nova

When the iron has been formed, it is so stable that it will not have any nuclear accumulation of nuclear. The planet will not produce heat and so the planet starts to collapse due to its gravity. This makes the iron particle inside has its temperature increased and the nuclear of the iron particles absorb electrons and protons to form neutrons. At the same time, neutron will absorb heat, then, the temperature will fall dramatically. Consequently, the planet can not stand for its gravity and it starts to collapse. The collapsed particles rebounded by touching the center of the planet and cause a explosion . This is called the Explosion of Super Nova.

Supernova 1987a before , after, and close-up

In 1987, for the first time in 400 years, a brilliant supernova lit up the sky when a star known as Sanduleak 69 202 exploded in a neighboring galaxy.

This star, located in the Large Magellenic Cloud some 160,000 light years away, had originally weighed about 20 solar masses. However, at the time of explosion, its iron core's mass was only 1.5 that of the Sun. Astronomers expect that the core had contracted to form a neutron star, but they're still searching for it.

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