Abstract:
Space-time ladder theory reveals that the matter (energy) changes can generate Energy-Qi field, and dark matter is present in the vicinity of matter (galaxy). Therefore, the first speculation of dark matter is the Energy-Qi field. Through comparative study, we found that in addition to the Newtonian gravity, the movement of the stars is also affected by the energy field and the Qi field:

, F is the force of Energy-Qi field, m is the mass of the stars, E is the energy field strength, v is the speed of the stars, and Q is the Qi induction. The moving speed of the stars is, from Newton force,

, from energy Qi field force,

, and the relationship between speed and distance in the two equations is just the opposite. After calculations we know that in the Milky Way, Newton force plays a dominant role in the area of less than 4 kpc. However, starting from 4 kpc, the velocity of the stars caused by the force of the energy Qi field gradually increases. At 8.5 kpc, the velocity of the stars caused by both force coincides, after which the velocity of the stars caused by Newton force gradually decreases, and the velocity of the stars caused by the energy Qi field force gradually increases.