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Stars also have their own life histories, from birth, growth, aging, and eventually death. They come in different sizes, colors, and evolutionary journeys. The star's connection to life is not only manifested in the fact that it provides light and heat.
In fact, the heavy atoms that make up planets and living matter were created during the explosions that occurred at the end of the lives of some stars. The current main-sequence phase of the Sun has been going through about 100 million years through computer simulations of stellar evolution and cosmochronological models. According to research, the rapid collapse of a cloud of hydrogen molecules 100 million years ago formed a Taurus T star of the first generation of the first generation, that is, the Sun.
The newborn star orbits in a near-circular orbit about 27,000 light-years from the center of the Milky Way. The Sun has reached middle age in its main-sequence phase, during which the stellar nucleosynthesis reactions that occur inside its core fuse hydrogen into helium. At the core of the Sun, more than 4 million tons of matter can be converted into energy every second, generating neutrinos and solar radiation.
At this rate, the Sun has so far converted about 100 Earth-mass matter into energy. The time when the Sun is the main-sequence star lasts about 10 billion years. The mass of the Sun is not massive enough to explode into a supernova.
In 5,06 billion years, when the Sun's hydrogen is depleted, the core is dominated by helium atoms, and the Sun will transform into a red giant, expanding its outer layers when the hydrogen in its core is depleted, causing the core to shrink and the temperature to rise. When its core temperature rises to 100,000,000 K, helium will fuse to produce carbon, which will enter the asymptotic giant branch, and when all the helium in the Sun is converted to carbon, the Sun will no longer shine and become a dead star (Black Dwarf).
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Because the Sun is a dwarf star, it doesn't burn for a long time, about 10 billion years, and now the Sun is about half the way through, so there's still 4 or 500 billion years left, and you don't have to worry about it running out of food.
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It should be about 5 billion years old, but in the middle and late stages of the Sun, it will become a red giant, grow larger and expand to swallow Mercury and Venus.
When the energy is finally exhausted, it becomes a white dwarf, which is a supernova explosion.
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How long does the sun have to live?
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The sun has 50-6 billion years to live. The Sun is a yellow dwarf star with a lifespan of about 10 billion years, and the Sun is currently about 100 million years old, about 50-6 billion years from now, the hydrogen element of the Sun.
When all depleted, the Sun's core will collapse, causing the temperature to rise, a process that will continue until the Sun is depleted of helium.
Fusion into the element carbon.
The Sun does not have enough mass to explode into a supernova.
Instead, in about 5 billion years it will enter the red giant.
, the helium core contracts in response to gravity and heats up at the same time; The hydrogen cladding immediately adjacent to the core accelerates fusion as the temperature rises, and as a result, the heat generated continues to increase, conducting it to the outer layer, causing it to expand outward.
The structure of the sun:
According to the relative intensity of solar activity, the sun can be divided into two categories: the quiet sun and the active sun. The Tranquility Sun is a theoretically assumed spherically symmetrical hot gas sphere whose properties vary only with radius and are uniform in either sphere, with the aim of studying the general structure and general properties of the Sun.
Under this assumption, the Sun is composed of the core, the radiation zone, and the troposphere, in order from the inside out.
It is composed of photosphere, chromosphere, and corona. Below the photosphere is called the interior of the Sun; Above the photosphere is called the solar atmosphere.
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The life span of the sun is estimated to be billions of years, and there should be no specific time, after all, the future is unpredictable.
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The lifespan of the sun is about 10 billion years, and currently, the sun is about 4.6 billion years old. The Sun has reached middle age in the evolutionary phase of its main order.
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The sun has a lifespan of 5 billion years, and humans will die when the sun is destroyed.
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The sun still has about 5 billion years of life.
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There is no scientific basis for this claim.
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Scientists now calculate that the sun has about 5 billion years left to live. So far, the Sun has passed half of its lifespan, and in about 1 billion years, the Sun may evolve into a red giant, when the Sun is too large and the Earth will lack water and there may be no life on Earth.
Yellow dwarfs have a lifespan of about 10 billion years, and the Sun is currently about 100 million years old. In about 50 to 6 billion years, the Sun's interior will be almost completely depleted of hydrogen and the Sun's core will collapse, causing the temperature to rise, a process that will continue until the Sun begins to fuse helium into carbon.
Although helium fusion produces less energy than hydrogen fusion, it is also hotter, so the outer layers of the sun will expand and release a portion of the outer atmosphere into space.
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In about 5 billion years, the Earth should be destroyed by a stellar collision or the engulfment of the sun's life cycle.
At that time, it will be accompanied by **, the sun still has about 5 billion years of life, and the external factor is the sun first, because it is the closest planet to the earth and can fate on the right earth.
That is to say, all the energy and power on the earth come from the sun, and once the sun has three lengths and two shorts, it will inevitably affect the earth. Before the 30s of this century, people always thought that the sun would one day burn out, turn from white to orange and then to red, and finally become a dark star that was silent, but its brilliant life.
In the 30s, when physicists learned the mystery of the sun's light, the situation was very different. It turns out that the Sun's energy comes from its thermonuclear reactions, and the Sun's lifetime will pass through the gravitational contraction phase, the main-sequence star phase, the red giant phase, and the compact star phase. The main sequence phase is the period of stability of the Sun.
Related Notes: The Earth rotates from west to east while revolving around the Sun. At present, it is 100 million years old, and there is a natural satellite - the moon, and the two form a celestial system - the Earth-Moon system. It originated hundreds of millions of years ago from the primordial solar nebula.
The radius of the Earth's equator is kilometers, the polar radius is kilometers, the average radius is about 6371 kilometers, and the equatorial circumference is about 40075 kilometers. The Earth's surface area is 100 million square kilometers, of which 71% is oceans and 29% is land. The main components of the atmosphere are nitrogen and oxygen, as well as small amounts of carbon dioxide and argon.
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