The Chemical-Nuclear-Astronomical Relationship

I have noticed a simple relationship between chemistry, nuclear reactions and astronomical bodies that I have never seen documented.

CHEMICAL AND NUCLEAR ENERGY

First, let's review the difference between chemical and nuclear energy. A material, such as wood, has bonds between the atoms holding it together. These bonds involve the electrons in orbit around the atomic nuclei in the material. Generally, organic substances are held together by so-called covalent bonds, in which neighboring atoms share electrons.

Metals are also held together by shared electrons among a group of atoms. This is why metals tend to conduct electricity, these loose electrons can be made to flow in one direction by the application of a voltage pressure to the metal. Non-metallic inorganic materials are held together by simple ionic bonds because one atom loses an electron to a neighboring atom.

Since the positive charges in the atomic nucleus are usually balanced by the negative charges in the electrons orbitting the nucleus, this means that the losing atom becomes positively charged and the gaining atom, negatively charged. Thus, the two atoms attract each other and are bound together.

These types of inter-atomic bond are known as chemical bonds because they involve only the electrons in orbit around the nuclei of atoms and not the nuclei themselves. These chemical bonds contain energy. If the bond is somehow broken, such as by heat, the energy that was in the bond holding the atoms together is released, also in the form of heat, which causes still more bonds to be broken and to release their energy. This is how burning takes place.

In chemical reactions, the nuclei of the atoms are not affected at all. However, the positively charged nuclei of atoms also contain energy, in fact far more energy than the chemical bonds. The positively-charged protons in an atomic nucleus are held together by a powerful so-called "binding energy".

If the nucleus can be split, such as by a fast-moving neutron, this tremendous binding energy is released in the form of heat. This is the basis of nuclear fission in atomic bombs and reactors. Just as in simple burning, the released energy and neutrons from a split nuclei go on to split other nuclei and sustain the reaction.

There is another nuclear process, fusion, which operates by crushing together two or more small atoms to form a larger atom but where there is less binding energy required than in the smaller atoms together. Thus, the extra binding energy is released. This is how stars operate. Energy is released by both burning, a chemical process, and nuclear fusion. As a general rule, the energy from fusion is about a thousand million (a billion in North America) times that from chemical processes.

SPHERIZATION IN ASTRONOMICAL BODIES

Now, consider the structure of an object such as a rock. The atoms in the rock are held together by chemical bonds, forming the rock's structure. The rock also has gravity, but in a small rock or boulder, this internal gravity is insignificant in determining the structure of the rock.

Gravity is a very weak force compared with the other basic forces of nature but it is cumulative, meaning that it adds up as mass accumulates. If we begin adding matter to the rock, eventually we reach a point in which it's gravity becomes more important in the rock's structure than the chemical bonds between atoms. At this point, the rock and the matter that has been added to it begin to take the shape of a sphere.

This is because a sphere is the geometric shape in three dimensions requiring the least energy to maintain. Most of the asteroids in the solar system orbitting between Mars and Jupiter are not spherical in shape. But the largest asteroids, such as Ceres and Vesta, are spherical or close to it. And, of course, larger bodies such as the earth, moon and, sun are inevitably spherical in shape. As a general rule, there is no body to be seen a thousand kilometers or more in diameter that is not spherical in shape.

The shape of such astronomical bodies reveals the most important factor in it's structure. If chemical bonds between atoms predominate, the shape will be non-spherical. When there is enough matter together so that gravity becomes more important than the chemical structural bonds, the shape will become spherical.

THE FUSION THRESHOLD

Now suppose we keep adding still more matter to our now-spherical body in space. Let's keep adding millions and millions of times the matter it had when it first took on a spherical shape. As we add more and more mass, the internal gravity of the body keeps building and building. Eventually something will happen, the body will begin to glow with a light of it's own. A star has been born.

The body became a sphere when the cumulative gravity was strong enough to become more important than the chemical structural bonds in forming the body's structure. The process of nuclear fusion begins and forms a star when the internal gravity of the body becomes so strong that it overpowers the electromagnetic force in the atoms at the center of the star and crushes them together to form larger atoms out of smaller ones. This releases binding energy in the form of heat and light to continue the process and form a star.

THE CHEMICAL-NUCLEAR-ASTRONOMICAL RELATIONSHIP

What I am pointing out in this relationship is that the order of magnitude in the energy obtained from nuclear, as opposed to chemical fuels is roughly the same as the order of magnitude between the amount of mass necessary to reach the spherization threshold to the amount of mass necessary to reach the fusion threshold and create a star. I have never before seen this pointed out and it makes the different branches of science seem much more inter-connected than ever before.