Yukio Tomozawa
The physical metric in general relativity has been introduced by the author as the exact solution of Einstein equation that fits the observation of time delay measurement of the solar system. Applying the physical metric to the galaxy with a simple assumption of mass density and pressure, one can find that the gravity acts a repulsive force inside the galaxy. The attractive force inside the galaxy is provided by negative pressure. As a result, one gets the velocity distribution in the galaxy that is very similar to the observed one. This indicates that the necessity of dark matter from the velocity distribution of the galaxy does not exist. If you’ve ever read anything from the field of physics, you’ll most likely be aware of the topic of dark energy, or dark matter.This theory is widely accepted among astrophysicists and suggests that around 96% of the universe is unobservable.
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