Is it not that all the energy on earth comes from the sun, then the nuclear fuel is also from the su

The vast majority of Earth's energy comes from the sun, but not all. Nuclear energy is basically not.

Fossil energy on the earth, such as coal, oil, natural gas, etc., is converted by the biological use of solar energy in ancient times through geological processes, and can be considered to come indirectly from the sun. Wind energy, water energy, tidal energy, etc., are also related to the sun and can also be considered to come from the sun. Not to mention biomass energy, which comes directly from the sun.

But nuclear energy is basically not. Nuclear energy existed before the formation of the Earth (before the formation of the solar system), and was formed by the supernova explosion of the previous generation (or generations) of stars in the Milky Way, dispersed in the universe after the supernova explosion, and then retained on the planets when the interstellar gas cloud condensed in Asia and Europe to form the solar system. Nuclear energy exists not only on Earth, but also on other planets and the Sun.

Nuclear energy has little to do with the sun. It is said that it is basically unrelated because nuclear fuel is divided into nuclear fusion fuel (hydrogen, helium and their isotopes) and nuclear fission fuel (uranium, thorium, plutonium, etc. and their isotopes). Among them, hydrogen, uranium, thorium, plutonium, etc., have nothing to do with the sun, and most of helium has nothing to do with the sun.

Only helium, an isotope of helium, helium-3, comes from the nuclear fusion reaction on the sun, but there is very little helium-3 on the earth, and basically there is no extraction and utilization value, only helium-3 on the moon has utilization value, but there is no way to extract and utilize it at present.

So, in the current situation, it is right that the nuclear fuel on the earth is not the first of the sun. In other words, the energy on the earth, except for nuclear energy, is better than the sun.

The vast majority comes from the sun, such as all fossil energy, as well as wind energy due to temperature gradients, gravitational potential energy, tidal energy, and so on. The energy of nuclear fuel comes from the fission of the nuclei of radionuclides, and this part of the energy can be traced back to the beginning of the birth of heavy elements, that is, when supernovas explode. So, broadly speaking, almost all energy sources are related to stars, nothing more than energy produced at different stages of the star's evolution.

Solar energy is energy (mainly solar energy) from celestial bodies outside the Earth, and the vast majority of the energy required by humans comes directly or indirectly from the sun. It is the various plants that convert solar energy into chemical energy through photosynthesis and store it in the plant. Fossil fuels such as coal, oil, and natural gas were also formed by ancient plants and animals buried in the ground over a long geological time.

They are essentially solar energy fixed by ancient organisms. In addition, hydropower, wind energy, wave energy, ocean current energy, etc. are also converted from solar energy.

The basic methods of solar energy utilization can be divided into the following four categories. Solar energy is the huge energy released by the fusion of hydrogen nuclei at ultra-high temperatures, and solar energy is a treasure trove of human energy, such as fossil energy, wind energy on the earth, and biomass energy are all better than the sun. Utilization of solar energy Indirect utilization of solar energy:

Fossil energy (light energy--- chemical energy) biomass energy (light energy --- chemical energy) Direct use of solar energy: thermal collectors (with flat plate collectors, concentrating collectors) (light energy --- internal energy) Solar cells: (light energy --- electrical energy) are generally used in artificial satellites, spaceships, lighters, watches, etc.