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Dark Matter According to scientist roughly 80 percent of mass of the universe is made up of material that scientists does not have the ability to directly observe Known as dark matter this concept does not have the capability to give off light or energy The universe rotational period consist of the stars orbit the center of the milky way galaxy The law of gravity states that the stars closest to the galactic center should travel faster than those near the galaxy s outer edge Astronomers have seen the rotational periods have had a dramatic change and the stars orbiting the galactic center are going roughly the same speed This is dark matter is what is taking a tug on the stars in their rotational period This is the matter that does not interact with light and we will not be able to see it This is something that may imply that we do not interact with electromagnetic radiation Approximately one quarter of the universe consists of dark matter which produces no detectable light energy but exerts a force much like gravity that pulls on all visible matter in the universe Dark matter does not interact with the electromagnetic forces in other words it does not absorb reflect or emit light making it extremely hard to spot Some researchers have been able to infer the presences of dark matter only from the gravitational effect it seems to have on visible matter
