Dark Matter Research Paper

One concept that has interested is dark matter and dark energy. Dark matter is the thing that makes it possible for galaxies to exist. When astrophysicists and cosmologist calculated why the universe is structure the way it is, it became clear that there’s just not enough normal matter. The gravity of the visible matter is not strong enough to from galaxies and complex structures. The starts would more likely be scattered all over the place and not form galaxies. Therefore, cosmologist concluded that there is something else inside and around them, something that doesn’t emit or reflect light, which is how it got its name, dark matter. However, besides being able to calculate the existence of dark matter, cosmologist had been able to find a trace of it in places with high concentration of dark matter, this …show more content…
Dark energy, in the other hand, is even more mysterious and strange. Cosmologist cannot detect it, measure it, nor taste it, but they do see its effects very clearly. In 1929, Hubble examined how the wavelength of light emitted by distant galaxies, shifts towards the red end of the electromagnetic spectrum as it travels through space. He found that fainter, more distant galaxies showed a large degree of red shift; closer galaxies, not so much. Hubble determined that this was because the universe itself is expending. The red shift occurs, because the wavelengths of light are stretched as the universe expands. More recent discoveries have shown that, the expansion of the universe is accelerating. Before that, it was thought that the pull of gravity would cause the expansion to either slow down or even retract and collapse in on itself at some point. However, dark energy seems to be some kind of energy intrinsic to empty space. Energy that is stronger than anything