Drunken Tiger
05-18-2002, 06:42 AM
This is my Science essay on the Big Bang theory.. I was wondering if you guys could help me improve on it by reading it...
Btw Im having trouble with the conclusion...Any suggestion would be greatly appreciated..;)
Thanks
The Beginning of the Universe
The Big Bang theory is the world’s most accepted theory of the Universe. The theory basically states that an enormous cosmic explosion created the Universe. This cosmic explosion is said to have happened between ten billion and twenty billion years ago. The cosmic explosion hurled matter in all directions and this very explosion formed our Universe. When the explosion occurred the galaxies were not clumped together, but rather the Big Bang laid the foundation for the galaxy. The origin of this particular theory can be credited to Mr. Edwin Hubble. Mr. Hubble made the observation that the Universe is constantly expanding. Mr. Hubble also discovered that the velocity of a galaxy is proportional to its distance.
There are three reasons why the Big Bang Theory Holds.
1) The Hubble Expansion
2) The Discovery of Cosmic Waves
3) The Big Bang Nucleosynthesis
Since the Big Bang the universe has been continuously expanding. This expansion is known as the Hubble Expansion, named after Mr. Edwin Hubble who discovered the occurrence. The Hubble Expansion simply means that if we look out into Universe, every galaxy we see is moving away from us. If everything were moving away from us wouldn’t that make us the center of the Universe? The obvious answer would be “yes” but the correct answer is “no”. What actually goes on is as the galaxies move away from you they also move away from each other. This analogy may make this whole Hubble Expansion easier to comprehend. Imagine a fruit loaf in the oven. As it rises the fruit move away from each other. If you were on one piece of fruit you may conclude that all the other fruit pieces are moving away from you. But if you were on another piece of fruit you will also see that all the other fruit pieces are moving away from you. So in this way there is no definite center of the Universe.
In 1964, two astronomers, Arno Penzias and Robert Wilson, in an attempt to detect microwaves from outer space, unintentionally they discovered a noise of extraterrestrial origin. The noise did not seem to come from one location but instead; it came from all directions at once. It became obvious that what they heard was waves from the outermost reaches of the universe, which had been left over from the Big Bang. This discovery of the radioactive aftermath of the initial explosion shed more light on the Big Bang theory.
During the “Era of Nucleosynthesis” almost all of the Universe’s lighter elements such as helium, deuterium (Heavy hydrogen), and a small percentage of lithium nuclei were formed just after the cosmic explosion (Big Bang). This process lasted for about 100 seconds after the explosion. One hundred seconds after the Big Bang the temperature began to drop to a point where the protons and neutrons were able to bond together without being torn apart by high energy photons (packets of light). Once the conditions were correct, the process of nucleus formation began. These were the first Atomic Nuclei. Some scientists believe that 98% of today’s helium was produced in those first few seconds.
Btw Im having trouble with the conclusion...Any suggestion would be greatly appreciated..;)
Thanks
The Beginning of the Universe
The Big Bang theory is the world’s most accepted theory of the Universe. The theory basically states that an enormous cosmic explosion created the Universe. This cosmic explosion is said to have happened between ten billion and twenty billion years ago. The cosmic explosion hurled matter in all directions and this very explosion formed our Universe. When the explosion occurred the galaxies were not clumped together, but rather the Big Bang laid the foundation for the galaxy. The origin of this particular theory can be credited to Mr. Edwin Hubble. Mr. Hubble made the observation that the Universe is constantly expanding. Mr. Hubble also discovered that the velocity of a galaxy is proportional to its distance.
There are three reasons why the Big Bang Theory Holds.
1) The Hubble Expansion
2) The Discovery of Cosmic Waves
3) The Big Bang Nucleosynthesis
Since the Big Bang the universe has been continuously expanding. This expansion is known as the Hubble Expansion, named after Mr. Edwin Hubble who discovered the occurrence. The Hubble Expansion simply means that if we look out into Universe, every galaxy we see is moving away from us. If everything were moving away from us wouldn’t that make us the center of the Universe? The obvious answer would be “yes” but the correct answer is “no”. What actually goes on is as the galaxies move away from you they also move away from each other. This analogy may make this whole Hubble Expansion easier to comprehend. Imagine a fruit loaf in the oven. As it rises the fruit move away from each other. If you were on one piece of fruit you may conclude that all the other fruit pieces are moving away from you. But if you were on another piece of fruit you will also see that all the other fruit pieces are moving away from you. So in this way there is no definite center of the Universe.
In 1964, two astronomers, Arno Penzias and Robert Wilson, in an attempt to detect microwaves from outer space, unintentionally they discovered a noise of extraterrestrial origin. The noise did not seem to come from one location but instead; it came from all directions at once. It became obvious that what they heard was waves from the outermost reaches of the universe, which had been left over from the Big Bang. This discovery of the radioactive aftermath of the initial explosion shed more light on the Big Bang theory.
During the “Era of Nucleosynthesis” almost all of the Universe’s lighter elements such as helium, deuterium (Heavy hydrogen), and a small percentage of lithium nuclei were formed just after the cosmic explosion (Big Bang). This process lasted for about 100 seconds after the explosion. One hundred seconds after the Big Bang the temperature began to drop to a point where the protons and neutrons were able to bond together without being torn apart by high energy photons (packets of light). Once the conditions were correct, the process of nucleus formation began. These were the first Atomic Nuclei. Some scientists believe that 98% of today’s helium was produced in those first few seconds.