There is endless particle in aerospace, because comprise,this is of material most subsection cannot be found, that is to say sacred particle cannot be found, particle is OK infinitesimal. From comet glow principle also can is informed, with quality for, it is impossible to have so bright light, but because it has huge rate, with aerospace in moving process medium material collides, chafe namely, and the photon with many generation, give out dazzling light. This and meteoric glow are about the same. Explain a thing in order to collide theoretically, gravitation is nonexistent, the gravitational force that person door place says is the pronoun of pressure. Understanding collision theory should understand a point of view above all; Be in between two objects or two objects when be contacted without any material or collide or moving, these two objects do not have the action of any force. Collision looks seem very simple question, but run rise very complex, everything has the rule and mobbish motion to be caused by it, collision is the source that all thing phenomena develop. 3 kinds of collision had learned in high school physics, 1 complete flexibility collides 2 be over completely inelastic collision 3 blame are completely stretch collision. No matter be which kinds of collision, the object can produce the change of speed and energy, we can understand from which a bit; Collision can deliver speed and energy. If did not produce collision, how do material and material produce mutual contact, without the happening of collision, the opposite motion between material and material has what sense again, did not produce collision, how material affects other material again, how are speed and energy delivered again between material. For instance the rocket can be delivered with the speed energy of fuel. Fuel burns in rocket launcher, fuel is become dispersedly countless particle to all around diffuse, to bomb same, and the way that rocket launcher exports has only, as a result of the action of rocket launcher wall, most particle and canister wall collide, deliver speed and energy to canister wall, and particle gets a retrorse speed and energy, particle speed direction produces a change, or it is the change that passes direction for many times, almost all particle wherefrom exit is shot, and form a kind of reactive force, the rocket moves ahead, quiver rear has much energy to appear. The only way that delivers speed and energy so is collision, deliver speed and energy through collision ability only. The heat that we know is delivered and be the pattern that transfers energy to object acting, but heat is delivered and need object and object to produce collision ability to come true to object acting. Heat is delivered is the process that the object with high temperature transfers energy to the object with low temperature, its energy is the process that the form that moves with particle conducts particle of that one part from this part particle, also can saying is the course that high-energy particle and feebleminded particle position produce a change, this process is completed with particle and particle collision. In order to heat water for, fire is the form that collides through particle can pass water. The particle in fire is OK more high-energy than doing particle, collide with the particle in water, express kinetic energy the feebleminded particle in water supply, the particle in water became high-energy particle, from this temperature heighten capabilities adds, nevertheless that is gradually process. Very apparent temperature and energy are with corporeal form existence. Be in in order to do work for, acting must exist strongly, and the has not made clear now explanation that how force produces. Know force is the interaction of two objects, but what kind of interaction, unmanned still and clear description passes. I am such understanding: Since force is the interaction of two objects, collide each other directly only or collide each other secondhand, indirect and mutual collision can say is to pass radiation action and each other. Nevertheless collision is not look of simple a few objects touch what can explain everything, fathomless is the action of corporeal field, they are the form that flows with particle what expression comes out is a kind of pressure, different result is shown through all sorts of running in the form with pressure. Because particle is phyletic,come out with various expression of the amount very more complex, people finds hard. Force also is the child that energy changes, the change of energy must occur strongly. Only the object collides each other the force of ability interaction, the power ability that had interaction has the presence of acting. Collision can say is two objects or many objects mutual elbow process, what arise to the other side is a thrust or it is extruding force, this is the most fundamental pattern of collision generation force. Cite an attrition strength first for; The object with a coarse underside slides in rough the earth's surface, want to gravity does premise of course, the object falls on underside entirely to the pressure of the ground, the particle on underside has the effect of pressure to the ground, when the object moves, the particle on underside is sure meeting and ground collide, had force of this collision attrition to arise from this, particle and particle photograph touch the strength that caused a hindrance body movement---Attrition force. Said gravitation is nonexistent in front, will explain now " gravitation " . Mix with the earth for the sun, the sun can give photon to give the earth a thrust through radiation only, this force is a repulsion actually, because a large number of photon bump the earth, what the earth gets is a thrust only, but this thrust can be delivered on the earth, and drive total an earth, make the earth runs, became the motive force of earthly rotation. Be in a poor light in the earth the face is met radiation gives much energy, these energy are sun photon is delivered come down, get as a result of the earth again aerospace a globose pressure, tellurian material runs out very hard, the energy that terrestrial radiation gives can be circled by the block of aerospace pressure, and to the earth one opposes impulsive force, the way of the direction of this force and radiation material is opposite, it can drive the earth to move ahead, because the contrail of sun photon is of curvilinear form, not OK can move to the earth point-blank, also be in because of the sun rotation, the material that radiation comes out can be protected shedding word some to move. While the earth runs, sun photon bumps earthly direction to be able to produce a change, terrestrial radiation gives the direction of particle to also can produce a change, the direction of the reactive force that the earth gets also follows change, the direction with that ongoing earth can produce a change, change athletic way frequently so, those who cause earthly contrail to circle sun revolution is elliptic. Then reactive force is us what say " gravitation " . Nevertheless this formula of reactive force can use gravitation formula to calculate. Malic be born is a pressure phenomenon, aerospace is brought about to pressure place of the earth. Aerosphere is one part of the earth, aerospace pressure is pressing aerosphere directly straight to the earth's core, the apple is in air, the force that get is natural also to the earth's core. As to magnetic force, apparently some are special, it is a pressure phenomenon actually. From microcosmic will observe, when magnet stands by another magnet or iron, can form a particle to flow to flow with magnetic induction direction, from one extremely flow direction another extremely, the other one aspect of the matter of a magnet gets the pressure of the outside, the outside can have a lot of particle inpour magnet inside, the one aspect of the matter of another magnet can pour out of particle, two magnet and outside make a particle loop system, into particle that end can be stood by another magnet by the pressure of the outside, the one aspect of the matter that pours out of particle can get a reactive force stands by additional magnet thereby, two magnet are stood by each other, suck together, became magnetic force. (www.my-paper.info my paper)