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'a Brief History Of Time' Essay

1923 words - 8 pages

A brief history of time by Stephen Hawking is a novel about the known range of time from the big bang up to black holes. Hawking talks about different theories and how they have changed over time from Copernicus to himself. He combines all known physics and astrophysics and displays them quickly and simply. He states that the goal of science is to able to accurately describe the universe in one theory. As he tells about theories that have disproved other theories of that time, it is proof that science is an ever-changing.
About 13.8 billion years have passed and only in the past 100 years have humans even come close to figuring out how it started. Georges Lemaitre was the first to propose the idea of the ‘big bang theory’ as the creation of the universe. the big bang theory states that all matter in the universe was originally condensed into an area smaller than the ball of a ballpoint pen and the radius rapidly expanded at a rate of one million million million million million times in less than a millionth of a second. That idea is generally accepted by most scientists, but not all scientists agree. Some scientists have created various other creation theories. Such as the steady state theory which was unveiled in 1948 by two men by the names of Hermann Bondi and Thomas Gold. Bondi and Gold had worked with Fred Hoyle to create this theory. The steady State theory suggested that galaxies were constantly moving away from each other and in between the galaxies, new galaxies would form out of newly created matter keeping the universe semi-uniform in appearance. But the steady state theory was short-lived due to new scientific discoveries, like microwave radiation. But the origin of the universe is still highly debated. One thing scientists agree on is that the universe was denser in the past then it is now, which supports the big bang.
It is a known fact that the universe has greatly changed its properties, such as texture and size and temperature, since its beginning. In the beginning, assuming the big bang is correct, there was a massive explosion sending debris in every direction. But over time, like people on a merry-go-round, the debris started spinning and eventually flattened out into a giant disc. But the universe is not the only thing that flattens out like this, planets do to. Planets flatten out small amounts over time due to the pull of gravity by other things and the planetary rotation that compresses everything towards the planet's equator. Because of the spiral compression, the universe overall went from rough, after the big bang, to smooth, as everything spins and becomes compressed. The size has drastically changed as well, from being at an atomic level to as big as it is today. Although it is hard to compare it to and atom because before the big bang, it is speculated that there were no atoms. The expansion of the universe is too great to put into rational numbers for multiple reasons. No one knows for sure how small or big the...

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