Recently, I have seen a number of articles discussing issues related to the age and causes of the Sun and Earth. I would also like to share with you my thoughts on the age of the sun on a whim. I'll quote a description of the general point of view before I make my point.
This is the basic overview of the Sun that Tara tells us: the Sun is the central object of the solar system, accounting for 99.86% of the total mass of the solar system. The eight planets in the solar system, asteroids, meteors, comets, trans-Neptune objects, and interstellar dust all orbit the Sun, which orbits the center of the Milky Way.
The Sun is a star at the center of the solar system, and it is almost an ideal sphere with thermal plasma intertwined with magnetic fields. The diameter of the Sun is approximately 1,392,000 (1.392×10⁶), which is equivalent to 109 times the diameter of the Earth; It is about 1.3 million times the size of Earth; Its mass is about 2×10³⁰ kg (330,000 times that of The Earth). In terms of chemical composition, about three-quarters of the sun's mass is now hydrogen, and the rest is almost all helium, including oxygen, carbon, neon, iron and other heavy elements with less than 2% mass, using nuclear fusion to release light and heat into space.
The Sun is currently passing through this interstellar cloud in the native bubble zone of the Orion Arm at the inner edge of the Milky Way. There are 50 nearest star systems within a distance of 17 light-years from Earth (the closest star to the Sun is a red dwarf called Proxima Centauri, about 4.2 light-years away).
The Sun is a yellow dwarf star ( with a spectrum of G2V ) , and the lifespan of a yellow dwarf is roughly 10 billion years , and the Sun is currently about 4.57 billion years old. In about 5 to 6 billion years, the hydrogen in the sun's interior will be almost completely depleted, 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 also has a higher temperature, so the sun's outer layer will expand and release a portion of the outer atmosphere into space. When the transition to the new elements ends, the Sun's mass will drop slightly, and the outer layer will extend to the orbit of Earth or Mars (in which case the two planets will be farther away from the Sun due to the decline in the Sun's mass).
And the age of the earth:
There are some ancient stable massifs on all continents of the Earth, such as West Greenland, Western Australia and South Africa. The rocks on these plots existed early in the formation of the Earth's crust, and there was no late remelting transformation. The age of these rocks was accurately determined in the 1970s using the Rb-Sr, U-Pb and Sm-Nd methods, with the oldest rocks in Australia (4.2 billion years, uranium-lead method) and Guyana (4.13 ± 170 million years, rubidium-strontium). This age can represent the lower limit of the time of crust formation.
Upper Age Using theories about the origin of the elements, an upper limit on the age of the Earth can be given. After the formation of elements, the solar nebula is formed, and then the planets such as the Earth are separated and condensed from the solar nebula. According to the theory of nucleon synthesis, the ratio of uranium isotopes U and U at the time of element formation is approximately 1.64:1. After they are formed, they decay at their own inherent rate, and U decays faster than U. Thus the abundance ratio of these two isotopes of uranium on Earth is 1:137.88. Based on these two ratios, we can estimate the age of the element to be 6.6 billion years. Although different theories estimate the abundance ratio at the time of uranium isotope formation, this age will not be less than 5 billion years.
Well, now that we assume that the above regarding the age of the sun and the earth is generally officially recognized, then, I will compare it from a personal point of view, and you will find that this is a ridiculous "science", which can be proved by the current scientific experiments that are recognized by human beings and can stand up to scrutiny, in fact, their theories are all fallacies, at least one of which is a fallacy.
We all agree that the universe is a continuous pool of nuclear reactions, a state of constant fusion or fission reactions, and that nuclear fusion reactions are a new way of generating matter that can stand up to simulation. From the current human beings, we can know that multinucleated elements are generated from mononuclear elements through a series of nuclear fusion reactions (we will not discuss the conditions of chemical reactions for the time being). The current composition of the Sun is mainly hydrogen and helium, that is, in the solar system, the Sun is the youngest celestial body. If you count the microparticles such as quarks that are currently known, it can only mean that the sun is only a celestial body that has begun to take shape. Because we know that there are more than a hundred kinds of elements on the earth, that is to say, a planet is a planet that is generated after an extremely long nuclear fusion reaction. If the sun from a pure hydrogen element composition of the celestial body, after more than 5 billion years to form the current sun, but also can predict that the sun after more than 5 billion years to basically complete the hydrogen fusion reaction, then the question is, from the helium sun through how much nuclear fusion, in order to react to generate lithium elements, and then generate beryllium, and then generate more nuclear material, how many 10 billion years, ? The earth has generated hundreds of multi-core elements, and, from the current age of the earth, the current state of the earth has evolved for more than 5 billion years. This shows that from hydrogen to helium, fusion takes 10 billion years, each polynuclear reaction a cycle, it can be considered that it takes ten billion years, from the earth's elemental analysis, the earth's main element oxygen element, oxygen is 8 atomic nucleus structure, that is, from hydrogen to the generation of oxygen, this has to polynuclear reaction 7 times, then, the age of the earth is at least more than 70 billion years, not more than 5 billion. There is also a question that everyone may want to know, since the earth elements are hundreds, then the age of the earth is not more than 1,000 billion years, but, here to explain, any celestial body he is not tight only one reaction, the generation of a substance, we from the test nuclear explosion point of view, he can generate a variety of substances at the same time, so we should take the most elements on the earth as the standard, other substances, we can be regarded as a by-product of the main reaction, therefore, we think, The age of the Earth should be around 100 billion years, not about 4.5 billion years younger than the Sun. As it stands, there is no younger person in the solar system than the sun.