Dark Matter

Dark matter and dark energy are two entities that have very little known about them, except that they make up about 95 percent of the universe. Even though this is a large part of the universe, it wasn’t even thought about until the 1960’s or the 1970’s. This is because of the fact that it is very hard to detect and almost impossible to see. Although it is impossible to see, we can see the effects of them both in our galaxy.

There is perhaps no current problem of greater importance to astrophysics and cosmology than that of "dark matter". The controversy, as the name implies, is centered on the notion that there may exist an enormous amount of matter in the Universe that cannot be detected from the light that it emits. The evidence of dark matter is from the motions of astronomical objects, specifically stellar, galactic, and galaxy cluster/supercluster observations.

From this background radiation, cosmologists have been able to learn things about the particles that filled the universe 18 billion years ago (the approximate time of the Big Bang).

The properties of regular matter include a composition of neutrons, protons, and electrons; it can be seen and touched. The properties of dark matter are unknown; dark matter cannot be seen, touched, interact with light, or produces radiation. Dark energy is also an unknown entity, but it is considered a form of energy. Dark energy is also known as the energy of nothing or the energy of empty space. Even so the big bang theory is still widely accepted among people as the start of the universe

Dark matter is an element which is non-luminous and cannot be identified directly by electromagnetic light but can be identified. Dark matter is believed to be the fundamental element that makes up the universe, and that could probably be the reason why it is difficult to separate it from other particles.

In inspiring people to have the passion in understanding the universal laws that govern us all, Professor Stephen Hawking reminds us on his speech for his 70th birthday to “remember to look up at the stars and not down at your feet” (enoch, 2012). Many scientists have been “looking up” and have discovered answers to the many questions that we have of the universe for ages. They have constructed theories, launched satellites, observed stellar phenomena, and even sent living beings in space to gain more understanding of the existence of everything. After centuries of research and observation, there are still some aspects of Astronomy that are still to be explored. One of them is the evolution of the Solar System, which is composed of the Sun and everything that travels around it. This includes eight planets and their natural satellites such as the Earth’s moon; dwarf planets such as Pluto and Ceres; asteroids; comets and meteoroids (Solar System Exploration, 2014). The Solar System is located in the Milky Way Galaxy, which is a part of a galactic group under the Virgo Supercluster. Figure 1 shows the location of our Solar System in the Universe. Many theories have been proposed on how the Solar System existed, but none has been completely successful. This spans from the time of the Ancient Greeks to the present 21st Century. As of now, the widely accepted theory is the Nebular Theory, which describes how the Solar System started as a large cloud of gas that contracted under

The universe of the past was understood to be a simple one-galaxy model that was both unchanging and immeasurable. Theories have constantly changed and been reconstructed to better portray the progression of human understanding over time. “The cosmos began

In order to understand our place in the universe, we must understand the universe itself. Scientists, researchers, astronomers, cosmologists, physicists, amateur astronomers and a slew of other groups of individuals largely interested in the cosmos, help with discovering new and fascinating theories or proof of different phenomenon within the universe. Three scientific articles help readers to realize scientists are constantly deep in work to unravel the hidden truths. “Dark Matter in the Discovery Age”, “Why the Universe Had no Beginning”, and “What String Theory tells Us About the Universe” include theories vastly different from one another, but lead to the same conclusion; the universe’s creation.

Throughout the second chapter of Investigating Astronomy: A Conceptual View of the Universe, authors Timothy Slater and Roger

The Hubble space telescopes findings have transformed the way scientist view the universe. Hubble has sent some of the most detailed images of the cosmos. These images have been the best images that humankind has ever seen. Over the years it has send back images of mysterious black holes, life cycle of star and picture of new planets. Even photos of the universe shortly after the big bang. Before hubble some of the most remarkable cosmic phenomenon such as black holes, were unable to be examined as they trap all light. Hubble was able to describe black holes due to what occurred around them. As black holes devour the the remaining of galaxies and hot cosmic

Dark matter helps with the expansion of the universe scientist think and dark matter fills the universe like a fluid said some scientist.When was dark matter discovered? Dark matter was first found in 1930. Dark matter was first thought of in 1930 when astronomers realized that galaxies could not have the needed gravity to retain their structures from just their visible matter.

In conclusion this unit on astronomy and cosmology helped me understand that there is so much more to the universe than I had initially thought. There is so much more that goes on and our knowledge will only increase as technology makes our ability to learn more about the depths of our

Every since I have read your book, Dark Matter, I have looked at reality in a whole different way. Every day when I make a sort of important decision I think what will happen if I take the other option which makes me quaver with fear. During the reading of this book, the plot was dispersing me causing me to try and regain the truth of the story. After finishing the book I was ravenous to hear what will happen next once the entered their new world and I felt like I was hanging of a precipice.

Dark Matter and Dark Energy are important. They can help us know how the universe began. These two are the mysteries of the universe; they compose about 90% of the universe. They are mysteries because we believe that they exist but we can’t see them or detect them. People question whether they manifest to be the same thing. Astronomers know very little about their constitution so they cannot assume they are related.

Carl Sagan, a widely known American scientist has changed the way that many people view the universe. In the essay, Can We Know the Universe? by Carl Sagan, Sagan uses many different questions and scenarios to relate to a diverse audience. This technique makes the essay more interesting to a variety of readers rather than just a certain group of people.