How old is the sun ? The universe is a collection of time and space, and it is also the most mysterious existence known to mankind. The relevant knowledge of the universe is very limited by mankind. Through continuous research on the universe, scientists now generally believe that the universe originated in a big bang.
The predecessor of the universe was a mysterious state of extremely high density, extremely high temperature, and positive small body. We call it a “singularity”, and this The big bang at the singularity gave birth to the universe.Do you know the age ? lets know…
How old is the sun ?
The sun is approximately 4.57 billion years old.
Meteorites found wreckage from the earth, by measuring the discovery of the oldest meteorites are 4.9 billion years, and the solar system meteorites from any region , but also younger than the sol. And the age of the sol is not too far away.
Scientists infer that the age of the sol is probably between 4.6 billion and 4.8 billion years. Now the sun is in a stable , middle-aged state.
After the sol is about 5-6 billion years later, almost all the hydrogen in the sol will be exhausted, and the core of the sol will collapse, causing the temperature to rise.This process will continue until the sol starts to fuse helium into carbon.
Extended information-The future of the sol
The sun in 6.5 billion years, the Sun center portion of the hydrogen will burn, and finally left with a spherical shell around the portion of the hydrogen combustion. In the no longer burning area in the spherical shell , the outward force that offsets the gravitational force weakens and begins to shrink rapidly.
At this time, the sun will become brighter and brighter, and the outer part of the spherical shell will increase in temperature and begin to expand due to the influence. This is the beginning of another stage-the red giant stage.
The red giant phase will last for hundreds of millions of years, during which the brightness of the sun will reach 2,000 times that of today, the temperature around Jupiter and Saturn will also rise, and the icy moons of Jupiter and the rings that are characteristic of Saturn will be evaporated without a trace. Finally , the outer part will even expand to near the current Earth’s orbit.
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A planet with the mass of the sun will only shrink to a certain extent in the central part where its density has become very high , that is, the temperature will only rise to a certain extent, and the fire in the central part will gradually disappear .
Gradually lost sun rays , the expanded outer portion of the shrinking and cooling a dense white dwarfs. By red giant era and survived the test of the planet will continue around the sun, all everything will be frozen, the last of the solar system will be a welcome silence end state.
What is the age of the sun now ?
The sun is about 5 billion years old! it is a huge hot gas ball, the main components are hydrogen and helium, and the surface temperature is about 6000K.
The energy of the sun comes from the internal nuclear fusion reaction , and it is at high temperature and high pressure. Under the circumstance of high, four hydrogen nuclei undergo a series of nuclear fusion reactions and become one helium nucleus.
In the process of nuclear fusion , the mass of the nucleus is lost, and the lost mass is converted into energy. The sun has no second due to the nuclear The energy lost by fusion is about 4 million tons.
At this rate of consumption, it has only consumed 0.03 percent of its mass in a long period of 5 billion years !
Although the solar radiation energy only reaches 2.2 billion parts per 1 to the earth But the impact is not to be underestimated! I only know these! It’s all done by hand.
How to calculate how old the sun is ?
The sun is the central celestial body of the solar system, accounting for 99.86% of the total mass of the solar system. The eight planets, asteroids, meteors, comets, outer Neptune celestial bodies, and interstellar dust in the solar system all revolve around the sun, and it revolves around the center of the Milky Way .
The sun is a star located in the center of the solar system . It is almost an ideal sphere intertwined with hot plasma and magnetic field . The diameter of the sun is approximately 1,392,210 (1.39210) kilometers, which is equivalent to 109 times the diameter of the earth; its volume is approximately 1.3 million times that of the earth; and its mass is approximately 210 kilograms (330,000 times that of the earth).
From the point of view of chemical composition , about three-quarters of the mass of the sun is now hydrogen, and the rest is almost all helium, including oxygen, carbon, neon, iron and other heavy elements with a mass of less than 2%, using nuclear fusion. Release light and heat into space .
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The sun is currently passing through the local interstellar cloud in the local bubble of the Orion’s arm at the inner edge of the Milky Way . The distance 17 light years earth from there the 50 most adjacent the star system (the sun from the nearest star is called red dwarf Proxima, about 4.2 light years).
The sun is a yellow dwarf (spectrum G2V). The lifespan of a yellow dwarf is roughly 10 billion years. The current sun is about 4.57 billion years old.
After about 5 to 6 billion years, almost all the hydrogen in the sun will be exhausted, and the core the will collapse, causing the temperature to rise.This process will continue until sun starts to fuse in helium into carbon.
Although less helium fusion energy in the energy generation ratio of hydrogen generated by fusion, but the temperature is higher, and therefore the sun outer layer will expand, and the outer portion of the air released into the space.
When the switch to the new elements of the process at the end, the quality of the sun will be a little drop, it will extend to the outer layer of the Earth or the orbit of Mars is currently running.
in fact, is to ask the sun to live how many years. We can guess the age of the sun in this way . First of all, we can assume that the it is older than the earth, and the age of the earth is easier to get a specific answer.
Scientists can measure the age of rocks and infer the age of the earth.
Radioactive dating can be used to measure the age of rocks. Radioactive materials have decay characteristics. After a period of time, half of the materials will become other materials.
For example, after 700 million years of radioactive element uranium-235 , half of the original uranium-235 will change. into stable lead 207, if we know the original content, as long as the measurement of existing content, it may be that the radioactive elements after many years.
We know through radioactive dating that the age of the earth is about 4.7 billion years old, so it should be older than 4.7 billion years old. Meteorites found wreckage from the surface by measuring discovered the oldest meteorite about 4.9 billion years, meteorite may come from any solar system area , perhaps younger than the sun, however, and the sun’s age should not be too far behind.
Astronomers believe that the current age is between 4.6 billion and 4.8 billion years.
If you continue to ask, how long can it live? How old is the sun’s lifespan? Astronomers believe that the sun’s lifespan is related to the mass of the sun. This also applies to all stars.
How long a star can live is related to the mass of the star. The smaller the mass. Instead, live longer. For example , a star like the sun has a lifespan of about 10 billion years, and the sun has lived for 5 billion years, but if a massive star with a mass ten times the mass of the sun can only live for about 10 million years.
Strictly speaking, the life span we are referring to is the time during which the core of the sun can undergo nuclear fusion reactions . According to theoretical calculations , the sun has a life span of 5 billion years.
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