This is a functional work, based upon the simple lessons that all should be able to understand. It is noted simply: that since your scientists claim it is "fusion" that exists on the sun, even without any evidence at all. Fusion is given here as the description of that fire on the sun/ so as to avoid conflict in discussion. Fusion, the combining of elements, IS CLEARLY NOT, what happens on the sun. Even so; do read a comprehensive simple development which questions a theory that CAN EXTERMINATE OUR LIVES. You owe it to yourself/ you owe it to your child.

Lesson four: the law of physics is, that for every action there must be an equal opposite reaction. That means in very large explosions such as are represented by a supernova "sun explosion"/ the reality of the mass, and the propagation of violence as caused by the explosion; does not allow all the energy to escape fast enough. In some cases/ that energy MUST then turn back upon itself, and become a black hole. It is the law: for every action there must be AN EQUAL reaction; which means if the energy cannot escape/ it must then do something else.
Thereby we know, that a black hole as is seen at the center of galaxy's exist because the energy of a massive explosion, simply could not be expelled fast enough, for the mass, or the energy at its core: to simply get out of the way.
The second law of physics involved is: that thermal dynamics require expansion for heat to exist/ or a pressure rise. The consequence of that is; mass trapped in place, at the center: by a supernova explosion or,"big bang": is expanding rapidly anyway by increasing pressures. The demand is SOMETHING MUST GIVE. Which means, if the energy and mass cannot get out/ then it must turn back upon itself. That fact/ that reversal of energy and mass toward the center instead of escaping outward, which was impossible; then becomes "dark energy/ dark matter". The reality of construction allows, that an intensity such as this has then altered space and time/ becoming its opposite: the absence of space within the structure itself. The inability to be measured; because there is no gap. An energy flowing in the opposite dimension of time, which is "not measurable/ not destructive, in the physical sense we know it as/ and is substantively always "headed toward itself". Or as its beginning demands: it must turn all energy back into itself/ instead of out, into space. A black hole however cannot contain all that energy within itself, as it draws more in; and some escapes through the center hole, into space. The center is where all forces meet/ the consequence of that is: if the energy cannot be contained, it must then be released, or the entire structure fails. If that were in essence the "big bang itself". The center closed, and the force of an energy contained (pressure rise) caused the entire structure to collapse at once

So we begin again on the theory of gravity that the sun is extremely massive, and thereby the anchor itself, in solar construction; as mass. Thermal dynamics, or Thermal expansion means that the fire seen on the sun has grown apart from its source fuel/ because it must, or be turned back upon itself. Consequently the fire by expansion lifts from the surface of its fuel. As is plainly seen with a candle. The sun is not, "the functional reality of its flames. Instead clearly we know by thermal dynamics; that the energy has expanded enough to allow room for itself on top of the flame. Heat expansion requires it/ the greater the heat, the more room required. Because this is a sphere, we know that the expansion is even greater than what would normally be seen here on earth, because there is no place else for that expansion to go, other than out. Like a flame on top of a candle/ the heat expansion rises above its fuel source, by a substantial amount even at a temperature change of roughly 400 degrees F. Your scientists proclaim that the aurora, outer edges of the sun's flame are millions of miles long and millions of degrees F hot. That means, the actual mass at the center of the sun CANNOT be anywhere near the mass they believe it is/ because thermal expansion will not allow it. It is a law of the physical universe.

Lesson five: your scientists theorize that the mass of the sun, is extremely hot at its core. They base their entire conclusion about gravity on this illusion. However the facts cannot support that theory, in any shape or form. If the core was on fire, then the entire mass is being consumed, all at the same time. IF THE ENTIRE MASS is being consumed at the same time/ as is a house on fire, all at the same time: it will be reduced to ashes quickly/ and will not be sustainable for long periods of time. We know the sun is relatively speaking: about as hot as it was several thousand years ago, by written human history; therefore we know that the relationship between a sustainable fire, and a fire that is literally out of control is determined by how much fuel is being burned/ at once. To retain its fire at a constant level, for these thousands of years: it cannot be consuming all its fuel at once. Rather that fuel is suctioned up, in the flames above.

Lesson six: in the reality of a supernova, as your scientists state, "they know". The first part of that reality in time and space is: for the flames of a sun to grow in size and heat. Therefore we know, that MORE FUEL is being burned. Simple as that, no other physical force can cause this effect/ therefore proven true. For more fuel to be burned, there must be fuel available that has not been involved in the flames before. That means the core cannot be burning as your scientists say/ unless they can prove as they suggest: the heavier materials are last to be burned at the center core. Which would mean: somehow the lighter/ less dense materials such as hydrogen would be burned first. That is contrary, and in open denial of gravitational pull/ and thereby unproven or dis-proven by their own theory. Because heavier materials sink to the bottom/ center first; is that not so. Consequently for a sun to burn as they say: it must consume the heavier materials first/ because that is what is available at the core. Leaving only less energetic materials/ with less gravitational pull for last. So they have defeated their own theory. Even so, the composite description demands a major explosion at the end of this cycle: without "dense explosive materials" how is that possible? Again proven wrong. When only the lighter materials are left, it is simply a flame dying out, smothering itself so to speak/ and the mass that is left; turns cold.
Lesson seven: your scientists declare, "that the sun is made out of hydrogen/ a gas"; because that is what their spectra-graph shows (lines that show a chemical signature, in a machine dividing the physical view of light). There is no doubt as to the fact that the most common "release of ash" so to speak, during a fusion fire is the least massive or most simple combination possible in atomic environments. Because everything else has burned away. Not a lot of pollutants coming off the sun from that fire/ which means nothing escapes, but the simplest elements, most of which can be reformed as they escape. The simplest elements possible to reform; are hydrogen first, and some potential helium. Or more simply the sun is NOT made of hydrogen/ the hydrogen seen is simply the result of the fusion process, the reassembly of what is left: its "smoke" if you will/ which turns out to be hydrogen.
So then lets review: your university diplomas/ with your political leaders providing your money: are gambling this entire planet and all life on earth/ BASED UPON the simple theory, "there is not enough gravity here on earth;" to allow fusion fire to continue burning. They consider it to be, an explosion that simply continues on as fire/ rather than an actual explosion that expands so rapidly it cannot be contained as fire. Which means to them that such an extreme gravity exists, a pressure so immense that it melts the core; which holds the fire to the sun.
The critical review of fire however, even here on earth where we know the difference between a molecular fire, as is common fire/ and a molecular explosion as is seen in such things as TNT, are not the same. There is a difference between an explosion, and a fire/ the energy release is entirely different. Which means the situational realities are also completely different. They assume that a thermo-nuclear bomb is fusion released; because of the energy/ rather than a fission bomb as is considered to be the first atomic bombs used. However, where is their proof?
We begin with the simple knowledge: to sustain anything/ everything cannot be involved at once. Something must be left to continue. Therefore the fire that is on the sun cannot be "all the fuel used at once. Some must remain "untouched" for later usage. An "explosion" cannot be sustained, because if it is represented by "the same fuel" throughout; as is atomic construction. Then the explosion will migrate through the same; and all will be engulfed at realistically, the same time. As is the case of a supernova event. The process of Fusion is then, something else. Fission is the existence of "an atomic environment being used like, a person/ proton: targeted in a dodge ball game"/ the effect is a release of energy in measured amounts. So long as the effects do not get out of control. When they do, you get an explosion because the energy release is too substantial to contain; it invades the entire composite; multiplying effects as it goes. When you multiply the intensity of energy release as is a thermo-nuclear bomb by degrading the bomb materials so badly: "they barely retain structure"; the energy release is also multiplied because of that weakening. It is however the very same basis and foundation of atomic energy, that creates the effect; fission/ not fusion. Its just "super-charged". Not fusion at all.