Knowing the Unknowable Astronomy Essay

461 WordsJul 27, 20142 Pages
When one looks into the sky from Earth he gazes upon shining objects amidst a vastness of gloom. However, 96% of this “space” as it has been coined is actually dominated by unknown forms of energy and mass. This unknown mass and energy is respectively known as Dark Matter and Dark Energy. Cosmology has, at its roots as a science, fundamental goals to analyze and discover the specific composition of matter and energy within the universe. Though most laymen known the universe is made up of neutrons, protons and electrons, it seems this widely understood view is misleading. Oppositely, we seem to exist in a universe that stretches our understanding of physics. The early evolution and structure of the universe was governed by an extremely large amount of Dark Matter. Such a large amount of dark matter has a mass approximately ten times that of all the stars, gas, and dust clouds in existence. This Dark Matter is theorized to have been created during the very intense amount of energy blow off that happened during the Big Bang. Properties of these particles of Dark Matter differ very much from those of “normal” matter and the interaction between the two is extremely weak. When the universe was created, in the earliest moments of existence, an impression was created by Dark Matter particles. These particles sketched the incredibly high temperatures and amounts of energy found as the universe expanded. This impression can be observed today by its long lasting and far reaching gravitational effects on relatively large structures within the universe. Recent observations have suggested that the expansion of the universe is accelerating. Dark energy, along with a significant amount negative pressure, has created a repulsive gravitational force that is necessary to explain this acceleration. While dark matter and dark energy have very similar densities, their

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