Supernova - The Greatest Alias »
• A star suddenly shines tremendously in space, as its radiation increases hundreds of times. This happens when the star is exposed to an explosion of all its mass, causing an intense light source, and its stellar matter is thrown away. Such explosions occur in stars that have come a long way in their development, reducing their stellar matter to a large degree, with the temperature of their core rising to about 600 million degrees Celsius. Which makes it under my force: centripetal gravity and outward pressing force.
• It is an astronomical event that occurs during the last evolutionary stages of the life of a massive star, where a massive stellar explosion occurs in which the star throws its atmosphere into space at the end of its life, and this leads to the formation of a bright, spherical cloud of plasma around the star, and the energy of the explosion quickly spreads into space, As for the center of the star, it collapses in on itself towards the center, forming either a white dwarf or turning into a neutron star, and this depends on the mass of the star. However, if the mass of the star exceeds about 20 solar masses, it may turn into a black hole without exploding in the form of a supernova.
• After the star consumes its fuel from hydrogen and helium through nuclear fusion, which produces heavier elements, it derives its energy from the fusion of light elements such as carbon, oxygen, and silicon, and it is converted into iron, Fe, and nickel, Ni. Then all of its fuel reserves to continue the nuclear reaction end.
This is because the fusion of the iron element does not produce enough energy to continue the fusion reactions, and the forces of gravity overcome the pressure generated in the interior of the star, and the star shrinks and collapses in on itself towards the center where the iron is concentrated, and this collapse leads to a huge rise in the temperature of the components that interact, producing neutrons and neutrinos in abundance. Which causes a supernova explosion.
The neutrons interact with the ionized elements in the scattered shell, forming elements heavier than iron. This means that the creation of elements heavier than iron is related to the occurrence of a supernova that produces these heavy elements, leading to uranium.
• If we go back to the formation of the solar system, we find that it left behind the explosion of a star much larger than the sun in the form of Supernova II, and from the elements dispersed by that large star in addition to the hydrogen that is present in bony clouds in space, the sun and its satellite planets were formed over billions of years under the influence of gravity. That is, the formation of the solar system 4.6 billion years ago is considered the second or third generation of stars, as the first generation of stars formed about 600 million years after the Big Bang, about 13.7 billion years ago.
• The greatest event of this kind occurred in the Milky Way Galaxy in the year 1054 AD, where it produced a huge cloud of gas called the Crab Nebula.
“We will leave you a picture of the Crab Nebula in the comments.”
• As an attempt to understand the occurrence of supernovae, astronomers classify them according to the incoming absorption spectra, which form fingerprints that identify the chemical elements that make them up. The first sign they use is whether or not hydrogen is present in the supernova. If one of a group of hydrogen lines is found in the spectrum of a supernova in the visible light range of the spectrum, astronomers classify it as a supernova II.
• Astronomers divided supernovas into two classifications according to the lines of the different chemical elements that appear in their spectra. The first element of this division is the presence or absence of the hydrogen spectrum. If the spectrum of a supernova contains a hydrogen line, it is classified as Type II, and otherwise it is Type I. Between these two groups, there are subgroups that are classified according to the presence of other lines and the shape of the curve of the light coming from the supernova.
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