Dark Matter and Dark Energy Essay

Dark Matter and Dark Energy Essay

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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.
One way that we can “see” the dark matter is the movement of the Milky Way Galaxy. While studying the Milky Way, scientists noticed that the outer rings of the galaxy were moving at the same speed as the inner rings (“Dark Energy, Dark Matter”, n.d.) . This may seem normal, but, due to the law of gravity, the outer rings should be moving slower because of their distance from other stars and planets, and because of their distance from the center of the universe. This means that there has to be an outside force that is pulling on the outer ring. Scientists theorize that this is dark matter. Scientists think that there is a ring around the Milky Way that may be as much as ten times as big as the outer ring of the galaxy itself. This effect is also seen in different galaxies. Also, in clusters of galaxies, the power of gravity is a lot stronger than it’s mass should suggest. The effects of dark energy were first seen in the 1990’s when scientists were watching IA supernovae. Scientists had already figured out how to calculate the distance of Ia supernovae, and they thought they knew the distance of the supernovae, but they were off by a lot, which means that there is an energy source that is pushing the universe apart.

The Theories of Dark Matter and Dark Energy
What are there two phenomena though? There is v...


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...t approximately five billion years ago, dark energy took over. This means that the universe is separating more rapidly than it used to. From this face, there are two theories of the universe’s end; the big chill and the big rip. The Big Chill is a theory that states that the universe will slowly drift apart until all of the stars die out and the planets all freeze and heat disappears. The Big Rip is an even more bleak theory. It states that the universe will expand faster and faster, due to dark energy, until galaxies rip themselves apart. Also, this quick expansion will lead to everything from galaxies to molecules violently ripping itself apart. Out of these two theories, the Big Chill is the one that is less likely to happen. this said, weather or not the Big Rip happens or not is all based on if dark energy stays or if it disappears as quickly as it appeared.




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Dark Matter and Dark Energy Essay

- 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. One way that we can “see” the dark matter is the movement of the Milky Way Galaxy....   [tags: theories, universe, gravity, supernovae]

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