・ Dark matter is matter and energy, which is supposed to describe the structure of the universe and the operation of the galaxy. (Fritz Zwicky in 1934)
・ It is named darkness from the fact that is not only not emitting light but also not reflecting.
・Dark matter is distributed spherically around the galaxy.
・From it is to us that can not be only three spatial dimensions recognition, dark matter can not be seen in motion in the other seven spatial dimension to us.
・Mass of dark matter is a kinetic energy of the particles(In superstring theory, it is string that vibrates at a high frequency) in motion in the other seven spatial dimensions.
• It can be detected by the gravitational lens effect.
・In observation of galaxies and galaxy clusters that have been made in the 1990s, if the space has to be flat, only dark matter was suggested that not be explained only about 25% of the universe mass. If the dark energy compensate about 70% of the remaining, can be explained that the universe is flat.
・The universe is expanding, but the dark matter and substances act as a brake against the expansion of the universe in order to attract each other by gravity.
☆ There are important things that do not appear in the table.