To give answers as to what is weight, gravity, and attractive force, how nuclear fusion reaction occurs, and how the black hole is formed and what it is all about.

Weight is a centripetal force that is created due to the fact that protons/neutrons are bodies of rotation of photons. Gravity is created by the centripetal force that protons/neutrons existing in an object generates. The energy of the protons and neutrons is doing a pulling work. this is the weight and gravity. This gravity acts among a plurality of objects. This is called the attractive force. Among stars, the nuclear fusion reaction takes place. This is because, in elements, much stronger compressive force that the force of pulling electrons that the centripetal force of the protons/neutrons exerts is applied from outside. The black hole is formed when much stronger compressive force than the centripetal force of neutrons in the center of a star is applied. The compressive force contracts the ring of the rotations of the neutrons with the centripetal force made further powerful.