A massive star with iron in its core will stop nuclear fusion, leading to its collapse and eventual explosion as a supernova. Iron is the element at which fusion becomes endothermic, meaning energy is no longer released in the process.
Technically a dead star is when a star no longer undergoes nuclear fusion. Depending on the mass of the original star this will either be a white dwarf, neutron star or black hole. These are called stellar remnants.
Hydrogen and helium are the lightest and most abundant elements in the universe. In the core of a massive star undergoing nuclear fusion, hydrogen and helium are fused into heavier elements like carbon, oxygen, and iron. Once the star reaches the stage where it can no longer sustain fusion reactions to produce heavier elements, hydrogen and helium remain as the last elements in its core before it undergoes a supernova explosion.
Iron. Iron is the heaviest element that can be produced through nuclear fusion in a star, and once the core of a massive star is mostly composed of iron, it can no longer sustain fusion reactions. This triggers its collapse and ultimately leads to a supernova explosion.
Nuclear fusion in stars involves the process of combining lighter elements, such as hydrogen, to form heavier elements, such as helium. As these elements fuse together, they release energy in the form of heat and light. Over time, through a series of fusion reactions, heavier elements are synthesized, up to iron, in the core of stars.
When the star no longer undergoes nuclear fusion.
A dead star, also known as a white dwarf, is the remnant core of a star that has exhausted its nuclear fuel. It no longer undergoes fusion reactions and gradually cools over billions of years. Sometimes, if it is part of a binary system with a companion star, it can reignite and explode in a supernova.
A massive star with iron in its core will stop nuclear fusion, leading to its collapse and eventual explosion as a supernova. Iron is the element at which fusion becomes endothermic, meaning energy is no longer released in the process.
The energy source of a white dwarf is primarily from nuclear reactions involving the fusion of helium nuclei, also known as the triple-alpha process. This process converts helium into heavier elements like carbon and oxygen, releasing energy in the form of heat and light. As a white dwarf no longer undergoes significant nuclear fusion, the energy it radiates gradually comes from stored thermal energy.
The phase of a star where it cools and fades away is called the white dwarf phase. During this stage, the star no longer undergoes nuclear fusion and gradually loses its heat and brightness over billions of years.
Yes - in the sense that it no longer produces energy. In other words, the star has run out of fuel for nuclear fusion.
Technically a dead star is when a star no longer undergoes nuclear fusion. Depending on the mass of the original star this will either be a white dwarf, neutron star or black hole. These are called stellar remnants.
Supernovae refer to the sudden expulsion of mass and energy when a large star can no longer fuse material matter. It results from the core collapsing into itself because it no longer has nuclear fusion to counteract it's own gravity and it's too dense for electron degeneracy to prevent collapse. .
This takes around 6.000.000 years but it could take longer depending on the amount of nuclear fuel spilt.
Hydrogen and helium are the lightest and most abundant elements in the universe. In the core of a massive star undergoing nuclear fusion, hydrogen and helium are fused into heavier elements like carbon, oxygen, and iron. Once the star reaches the stage where it can no longer sustain fusion reactions to produce heavier elements, hydrogen and helium remain as the last elements in its core before it undergoes a supernova explosion.
Technically a dead star is when a star no longer undergoes nuclear fusion. Depending on the mass of the original star this will either be a white dwarf, neutron star or black hole. These are called stellar remnants.
about 5 million times a second however being a fierce fire power is very modest destiny of the heat generated per gallon