Dark matter is everywhere, shooting through you every second of your day. You must ask yourself the question of how a particle so heavy in mass, a particle that can influence whole galaxies in the way they spin and their positioning in the universe, is still yet to be detected? This is down to the fact it doesn’t interact with light at all, it is literally ‘invisible’. Dark matter is the building blocks of the universe, without it, star systems like the Milky Way would cease to exist. Dark matter is an invisible mass that has such a large gravitational pull it can affect the speeds of entire galaxies in a cluster. The majority of the mass from a galaxy is actually considered to be dark matter.
For example, “The Coma Cluster of Galaxies” is always moving at extreme rotational speeds. However, we can measure the mass of these galaxies by measuring the speed at which they travel and after the measurement it is obvious there is far too much mass to account for the amount of gas and planets in that cluster therefore, you must conclude that there is something else there making it so heavy. It appears there is actually about ten times as much dark matter in this cluster than there is …show more content…
Therefore, the further an object is from the centre the slower it will travel in orbit because the gravitational pull is weaker. This can be easily explained in an equation giving the force between two masses; (g=(GM_1 M_2)/r^2 ). G is the Gravitational constant, M_1is the mass of object 1, M_2 is the mass of object 2 and r is the distance between the two objects. This equation explains very clearly that if you increase the distance between the two objects, the force will be smaller between the two objects. The equation displays an inversely proportional relationship with r^2 and the force. Therefore, the closer a galaxy got to dark matter the greater the pull it would have on it, causing clusters of