matter
Dark matter and dark energy
hereinafter referred to as dark matter and dark energy. space is an energy state with average energy density. If a substance does not reach the minimum energy density, it will collapse and disappear. From this point of view, space is stressful. therefore, any substance must be greater than the minimum energy density (primary density for short) to survive, including dark matter and dark energy. dark matter is a matter of extremely low quality, which can not be perceived and measured until it is too low, and it can exist only…
