A star has been burning for so many years that all of the hydrogen and helium is just sucked out of it and after a star burns out, let's say if the sun were to burn out, then it would collapse into a red giant. Bigger and more massive stars collapse into super giants. But if the sun were to collapse into a red giant, it would become bigger and bigger and eventually suck in all of the planets in the solar system. Even if the red giant weren't to reach out as far, the gravitational pull would suck in all of the other planets. And red giants or super giants only live a short amount of time before either turning into a white dwarf or a supernova, depending on its mass.
Yes at first its made of dust in the space the it will form a star with a blue-white colored star, then yellow, our sun today (2010) is a yellow star, the a red giant it can be a nova that will lead to a black hole or a white star then a black dwarf
Another reply: Obviously they run out of fuel. To understand this doesn't require advanced nuclear physics: it follows directly from the Law of Conservation of Energy.
What actually happens, though, is that stars get their energy from convertir hydrogen to helium, and later in their life (for some stars), converting hydrogen to heavier elements. Eventually, they will run out of the lighter elements, and can produce no more energy. Small stars (the vast majority of stars in the Universe) are not as wasteful of their fuel as the bigger stars, and this process can take trillions of years.
About the collapse, it seems that all stars will collapse once they run out of fuel. Depending on their mass, they can turn into a white dwarf, a neutron star (a.k.a. pulsar), or a black hole.
the star shrinks because the nuclear helps the star grow so with out it the star will shrink
When the sun runs out of fuel it is expected to turn into a red supergiant engulfing earth. Then it is supposed to shrink into a white dwarf.
Initially, 5 billion years ago, a large collection of Hydrogen gas accumulated over time to form a large body of gas. When temperature gets extremely high in the core of this body, nuclear fusion starts, using the gas as fuel. So, there was already gas in the first place, and the star dies when this fuel runs out.
when a supernova occurs and the star is destroyed but if some how the nucleus survives and its mass is 1.4 solar masses then the nucleus started to shrink under its own gravity then the next stable state is neutron star.
um true?
the only reason a star stays 'alive' is because it creates enough outward force from nuclear fusion to fight off the force of gravity. when a star runs out of fuel, the main and first option being hydrogen, the easiest to use, to create power, it has two options. the star has to try to fuse helium which is a lot harder to do, and requires a lot more heat to do, then beryllium and so on up to carbon which a star cannot fuse. then, when the star runs out of fuel that it can burn, gravity pushes all of the solar mass to the core. this is how a supernova is started. if the core manages to handle the pressure, it turns into a white dwarf star, if the core collapses, then it turns into a spacial anomaly known as a black hole. the outcome is a result of the amount of solar mass.
When the sun runs out of fuel it is expected to turn into a red supergiant engulfing earth. Then it is supposed to shrink into a white dwarf.
black hole
A red giant forms when a star runs out of hydrogen fuel at its core and starts fusing hydrogen in a shell around the core the core. This causes the star to expand and cool.
red giant
Initially, 5 billion years ago, a large collection of Hydrogen gas accumulated over time to form a large body of gas. When temperature gets extremely high in the core of this body, nuclear fusion starts, using the gas as fuel. So, there was already gas in the first place, and the star dies when this fuel runs out.
when a supernova occurs and the star is destroyed but if some how the nucleus survives and its mass is 1.4 solar masses then the nucleus started to shrink under its own gravity then the next stable state is neutron star.
Because a massive star has more pressure on the core, this creates greater temperatures, which increase the amount of nuclear fusion that occurs. This uses more hydrogen and thus the star runs out of fuel much quicker, that a smaller star.
um true?
The sun produce energy during the nuclear fusion process when hydrogen atoms are converted into helium atoms in the core of the sun. When the sun runs out of hydrogen it will "start to die".
When the sun starts to burn off all of its fuel, however, it will start to lose its mass. The sun will then start to expand into a red giant. After this phase, the remaining part will shrink and become a white dwarf, which is about Earth's size but a million times denser and very hot. The expanded part of the sun will be released into space, creating a planetary nebula, which is basically an enormous ball of gas.
The core contracts, raising the temperature and increasing the size of the region of hydrogen shell-burning.
the only reason a star stays 'alive' is because it creates enough outward force from nuclear fusion to fight off the force of gravity. when a star runs out of fuel, the main and first option being hydrogen, the easiest to use, to create power, it has two options. the star has to try to fuse helium which is a lot harder to do, and requires a lot more heat to do, then beryllium and so on up to carbon which a star cannot fuse. then, when the star runs out of fuel that it can burn, gravity pushes all of the solar mass to the core. this is how a supernova is started. if the core manages to handle the pressure, it turns into a white dwarf star, if the core collapses, then it turns into a spacial anomaly known as a black hole. the outcome is a result of the amount of solar mass.