What is the disadvantage of the Big Bang theory?
The main disadvantage of the Big Bang theory probably lies in our inability to explain where the original "ball" of energy came from that did the expanding (the "Bang") to form the universe and the spacetime that it occupies. Note, if you please, that the universe did not expand into an "empty" universe or volume of space, but involved all the energy that "condensed" and the creation of spacetime in which to exist.
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It is important to first realize that the big bang theory is a theory; it is not a physical law on its own for which there might be loopholes. However, I think (correct me if… I am wrong though), that you are referring to the idea that the big bang theory states that the Universe started with a bang which just came into being out of nothing. This is not entirely correct, the big bang theory does not implicitly say that the Universe came into being at some point; it only says that in the distant past the Universe was very small and that it has been expanding ever since. This statement is well verified by observations and measurements. It does not claim or explain how the Universe came into being. It might sound reasonable that the Universe somehow came into being as a point, and it would fit with the above statements, but the creation of the Universe itself is not yet something that science can say much about. There are models, such as string theory, that sometimes have things to say about this, but they are far from testable at this stage. So, yes, it is possible that something else happened before the Universe became tiny and started to expand, and it wouldn't contradict with the big bang theory at all. (MORE)
Fred Hoyle was a theorist who was working on the opposing view to the Big Bang model, called the Steady State hypothesis. In an attempt to show how ridiculous he believed the …premise of the Big Bang theory to be, he coined the term "Big Bang" as an insult to the theory. However, proponents of the theory liked the name, and so adopted it. (MORE)
The Big Bang is the dominant (and highly supported) cosmology of the beginning state of our Universe. In essence, it states that our Universe began from an initial state of ve…ry high density and temperature, which has expanded over billions of years to form a Universe as we now observe it. Together with Inflation, certain predictions of what we would see today in our Universe are made -- and pretty much all of said predictions have been confirmed. (MORE)
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The Big Bang Theory can never be certainly proven, simply because there was no one around to witness it. However, there is some very strong evidencce supporting it. There are …only two ways to go: Either the Universe has always existed, or it had a beginning. Very strong evidence points to the latter. Proof the Universe is Expanding First and foremost, the Universe is expanding. This has been known for decades. Every galaxy outside our Local Group is speeding away from us. Imagine putting raisins in cake dough. As the yeast makes the cake rise, it expands and the pieces of raisin move further away from each other. This is what we observe with galaxies. As galaxies move away from us, this causes their light to be shifted towards the red end of the spectrum, and the farther away they are from us, the greater the red shift. It's true that there are some galaxies as far away from us as the Virgo cluster that are approaching us and thus have a blue shifted spectrum, but those are merely because of these galaxies motions within their parent clusters. Moreover, there is a direct relationship between a galaxy's velocity away from us, it's red-shift and it's distance from us. More proof came when quasars were first observed. At first, astronomers couldn't make sense of their spectra because they didn't appear to match any of the chemical elements. Then they realized they're showing even greater red-shifts than the galaxies they were studying, and the spectra they took were actually that of ionized hydrogen. Today there are many quasars known that are moving away from us at 90 percent of the speed of light, and light that is normally in the far ultraviolet and x-ray region of the spectrum has been shifted into the visible range. So there is proof that space itself is expanding, and moreover examination of supernovae in distant galaxies is showing that expansion is also accelerating. These supernova in distant galaxies are fainter than they should be based upon current theories, indicating that the Universe rate of expansion was not constant over it's lifetime. Today, dark energy and dark matter are vying for dominance, and it's dark energy that is forcing space to expand at an accelerating pace. Currently there is almost no doubt in the scientific community that the Universe is, in fact, expanding. Cosmic Microwave Background Radiation Some more evidence for the Big Bang was discovered in the 1960's. By pointing a radio telescope to the sky, we could practically "hear" the "echo" from the Big Bang. Instead of being a sound, it is actually leftover thermal radiation from the Big Bang which permeates the entire Universe. At the moment just after the big bang, the universe was full of tremendously hot hydrogen plasma emitting radiation at all frequencies. As the universe expanded the gas thinned out. Eventually it went from glowing white hot, to red hot, then continued to cool as it expanded so that today it is so cold that it only emits gentle microwaves. The thing is that these microwaves are at the exact intensity that the big bang theory predicts they should be given the age of the universe. No other theory successfully predicts the nature of the microwave background, so that is one of the many reasons scientists, as well as all scientifically literate folk, choose to accept the big bang theory as the best theory that we currently have to explain the current state of the universe. The fact that this radiation is detected within the same ranges in all directions confirms that it doesn't come from a fixed or finite source, but rather from the early universe itself. _________________ Universal expansion and the CMB radiation combined are the two strongest pieces of evidence pointing to the Big Bang, which is why in the scientific community there is almost no doubt the Big Bang occured 13.7 billion years ago. Of course there are still little pieces of evidence but these two are the major ones. This is not to say that the Big Bang is certainly how the Universe came into existence, because we will never know for sure. However, the evidence is quite strong, and makes it the most likely (and only) theory for why the Universe is the way it is today. (MORE)
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the effects of the Bing Bang Theory are what we see around today.The bing bang theory led to the formation of the stars,the planets ,the galaxies etc.as it expanded.As the uni…verse expanded it became cooler and cooler and thus the earth and other planets were able to form a hard outer ,solid layer crust around itself. (MORE)