The Role of Dark Matter in the Universe

Dark matter is a material that can not be detected from the radiation emitted or the absorption of radiation coming into the material, but its presence can be proved by the gravitational effects of materials that look like stars and galaxies.

Dark matter almost dominates 30% of the material present in the universe, so the tensile force generated by dark matter also dominates the formation of the universe on a large scale. Among these are the galaxy clusters.

Dark matter plays a decisive role in the universe. Based on observations made by astrophysics experts on galaxies, stars, and planets in the universe, they conclude that dark matter is a material that has a very important role to keep the heavenly bodies fixed in its orbit at high speeds though distant from the galactic core and not thrown from its orbit.

How exactly is dark matter? The calculation of all visible masses in the Milky Way system has been done, but it is insufficient to generate such a counterweight force. That is, there must be a matter or invisible energy, working in the universe. But this dark matter and energy are not only responsible for maintaining the stability of planetary orbits, stars, and galaxies.

Furthermore, dark matter and dark energy are concerned with the formation and development of the universe itself. Actually, the existence of matter and dark energy was predicted by the inventor of the theory of general relativity, Albert Einstein in 1915 ago. Namely in the form of bending light, space and time. Also based on his general theory of relativity, Einstein proposed two choices of forms of the universe. That is a static universe or a universe that continues to expand. According to calculations, Einstein asserted that the universe is continuing to expand. At the beginning of the 20th century, most astronomers believe in a static universe. In support of the ever-expanding universe theory, Einstein included what he called the cosmological constant into his mathematical equations.

Indeed later Einstein admitted to doing great foolishness, by smuggling the cosmological constant into his equations. However, a few decades later, recognized as Einstein's great silliness, turned into a science demands. Because, in a recent study, it is known that this universe, not only expands but the speed of expansion also continues to grow. Evidence of the acceleration of expansion, found in Supernova's observations, is a star that exploded away at the edges of the universe, in the form of changes in the spectrum of light. To allow for acceleration, energy is required. But where is the energy, if all matter and energy are visible, the total volume is very small?

It comes from dark matter. Typically, dark matter forms a large halo circle in the galaxy. Halo that's what keeps our galaxy in place. Without a halo circle, the galaxies in the universe will be scattered. But for one galaxy in this cluster, the central halo of the halo's center halves 5000 light years away from where it should be.

The experts then unveil a theory that the shaping of the darkest period in the universe is WIMPS (weakly interacting massive particles) or large, weak particles that interact with each other in the universe. This particle has the opposite energy of gravity because it pushes other particles like nuclear force effects.

Allegedly, the cause of the central halo point in the Abell 3827 galaxy is due to the force of other dark particles that are also located near the galaxy. In addition, bursts of star formations located next to the galaxy are also suspected to be the cause of deviated halo center.

Still, the presence of dark matter particles in the universe is the best explanation of the halo's halo. "But we still need strong evidence." Said Jason Rhodes, a dark matter expert from NASA's Jet Propulsion Laboratory, explained to National Geographic that there is current research on galaxies linked to this strange phenomenon.

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