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Thread: Please explain me how did universe came into existence?

  1. #1 Please explain me how did universe came into existence? 
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    Hello friends,I have very little knowledge of science.I want to know how the universe came into existence.I just know that something called Big Bang explosion caused it to exist.then what was before it?what caused Big Bang?What happened after it?How did life came on earth?


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    Nobody knows.

    We know lots from that point on.

    Before that? Lots of hypotheses. No evidence. No maths. No physics.


    "Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen." Winston Churchill
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    Quote Originally Posted by adelady View Post
    Nobody knows.

    We know lots from that point on.

    Before that? Lots of hypotheses. No evidence. No maths. No physics.
    You mean god? Or something else.Please tell me whatever it is.How many theories are there for creation of evidience. Do all scientist believe in Big Bang?If not then they believe in what?I have read about Big Bang, there are many evidience a for it.
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    Quote Originally Posted by Lawman View Post
    Quote Originally Posted by adelady View Post
    Nobody knows.

    We know lots from that point on.

    Before that? Lots of hypotheses. No evidence. No maths. No physics.
    You mean god? Or something else.Please tell me whatever it is.How many theories are there for creation of evidience. Do all scientist believe in Big Bang?If not then they believe in what?I have read about Big Bang, there are many evidience a for it.
    Lawman, this has already been explained to you. The big bang is not a theory of creation. Nobody knows how the universe was created. You are going to have to live with that.
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    Quote Originally Posted by Lawman View Post
    Hello friends,I have very little knowledge of science.I want to know how the universe came into existence.I just know that something called Big Bang explosion caused it to exist.then what was before it?what caused Big Bang?What happened after it?How did life came on earth?
    I will repeat what I said last time you asked ...

    We don't know how the universe came to exist. (It may have always existed. It may have been created by a god, or by alien lizards. It might have been an accident.)

    The big bang theory does not describe the creation of the universe.

    The big bang theory just describes the evolution of the universe from an earlier hot dense state based on the evidence we see around us.
    Without wishing to overstate my case, everything in the observable universe definitely has its origins in Northamptonshire -- Alan Moore
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    Quote Originally Posted by Lawman View Post
    You mean god? Or something else.Please tell me whatever it is.How many theories are there for creation of evidience. Do all scientist believe in Big Bang?If not then they believe in what?I have read about Big Bang, there are many evidience a for it.
    I wouldn't say all scientists believe the big bang for three reasons:

    1. All scientists will never agree on everything. That is how we make progress.

    2. Ideally, scientists do not "believe" in the big bang. Rather, they accept it based on the evidence. (I have heard some scientists say they don't like the model but it is the best we have at the moment.)

    3. There are scientists working on alternative models.

    Note that the big bang doesn't say anything about the creation of the universe. There is a lot of speculation in that area. Markus summarised some of it in this thread:
    Spontaneous Emergence of the Universe
    Without wishing to overstate my case, everything in the observable universe definitely has its origins in Northamptonshire -- Alan Moore
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    Lawman, you have been asking some important and fundamental questions. Complete answers to these questions could fill many books. It would be helpful to those members who are answering you to know a little bit more about your background.

    I see from your forum profile that you are seventeen. Are you still in school, or college? Did you have any science teaching in your schooling? What country do you live in?

    If you prefer not to answer these questions that is OK, but the answers could help members explain things in the best way for you.
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    Quote Originally Posted by Strange View Post
    Note that the big bang doesn't say anything about the creation of the universe. There is a lot of speculation in that area. Markus summarised some of it in this thread:
    Spontaneous Emergence of the Universe
    Note, however, that even Markus's speculation would not really provide the kind of answer that Lawman seems to be looking for. Here's what Markus wrote.
    Quote Originally Posted by Markus
    So there you have it - a highly simplified, yet mathematically rigorous proof of concept that a universe can indeed spontaneously emerge from something that is neither space nor time, and hence "nothing". However, "nothing" is not "no thing" - the underlying system of degrees of freedom contains all the recipes and ingredients needed to give birth to a universe, like a bubbling and foaming "primordial soup", via quantum principles that are inherent in it.
    This only pushes the explanation one step back, and leaves open the question of where the 'primordial soup' came from.
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    Quote Originally Posted by Harold14370 View Post
    the question of where the 'primordial soup' came from
    That question would be meaningless, because the initial state is not spatio-temporal in nature; it is an abstract system of degrees of freedom which in itself does not stretch across space or time. As such, the notion of it having a "beginning" or "end" has no meaning, and so neither does the question of "where it came from".

    Note though that this is leads us into the borderlands of what physics can do, and becomes largely philosophical.
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    Quote Originally Posted by John Galt View Post
    Lawman, you have been asking some important and fundamental questions. Complete answers to these questions could fill many books. It would be helpful to those members who are answering you to know a little bit more about your background.

    I see from your forum profile that you are seventeen. Are you still in school, or college? Did you have any science teaching in your schooling? What country do you live in?

    If you prefer not to answer these questions that is OK, but the answers could help members explain things in the best way for you.
    Got science teaching but never liked science and I just mugged it up without understanding it
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    Ok got it.We don't know what was before Big Bang.We don't know what caused Big Bang.Is that it?
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    Will ever science come to know what was before it?
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    Ok just tell me what is Big Bang.that internet stuff is just not for me .Its scientific terms are very difficult.I am asking because I just have a rough idea and 100% sure it is wrong?Ill ask questions after it.
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    Quote Originally Posted by Lawman View Post
    Ok just tell me what is Big Bang.that internet stuff is just not for me .Its scientific terms are very difficult.I am asking because I just have a rough idea and 100% sure it is wrong?Ill ask questions after it.

    The Big Bang is the current model of the origin of the universe, which holds that it emerged from a state of extremely high temperature and density,
    after which it vastly (yet shortly) expanded ca. 14 billion years ago.

    There is a simplified Wikipedia article about that subject:
    Big Bang - Simple English Wikipedia
    "The only safe rule is to dispute only with those of your acquaintance of whom you know that they possess sufficient intelligence and self-respect not to advance absurdities; to appeal to reason and not to authority, and to listen to reason and yield to it; and, finally, to be willing to accept reason even from an opponent, and to be just enough to bear being proved to be in the wrong."

    ~ Arthur Schopenhauer, The Art of Being Right: 38 Ways to Win an Argument (1831), Stratagem XXXVIII.
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    Quote Originally Posted by Lawman View Post
    Ok just tell me what is Big Bang.that internet stuff is just not for me .Its scientific terms are very difficult.I am asking because I just have a rough idea and 100% sure it is wrong?Ill ask questions after it.
    Early on (about 13.7 billion years ago) the universe was extremely hot and extremely dense. It expanded and cooled. After a very short time it cooled enough for the building blocks of atoms to form.

    But it was still so hot and dense (and ionised) that it was opaque. Then it cooled further and, after about 360,000 years, it became transparent and released a lot of light (which we see today as a faint microwave background radiation).

    Then it cooled further and clouds of hydrogen gas started to form clumps. And then they collapsed and formed stars and galaxies.

    Then some of the stars exploded spitting out other heavier elements that had been formed by nuclear fusion in the stars. Eventually some of this dust collapsed to form more stars and planets around them.
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    Without wishing to overstate my case, everything in the observable universe definitely has its origins in Northamptonshire -- Alan Moore
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    Quote Originally Posted by Lawman View Post
    Will ever science come to know what was before it?
    Maybe. A theory that combines gravity and quantum theory might tell us more.
    Without wishing to overstate my case, everything in the observable universe definitely has its origins in Northamptonshire -- Alan Moore
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  18. #17  
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    Quote Originally Posted by Lawman View Post
    Ok just tell me what is Big Bang.that internet stuff is just not for me .Its scientific terms are very difficult.I am asking because I just have a rough idea and 100% sure it is wrong?Ill ask questions after it.
    Another way of looking at this question, is to consider the history of the theory.

    It used to be thought that the universe was eternal and unchanging.

    When Newton first realised that everything in the universe was affected by the same laws of gravity we see on Earth (this explains the orbits of the moon round the earthj, the Earth, round the Sun, etc.). He proved that the universe must be infinite, otherwise it would collapse due to its own gravity.

    Then Einstein came up with his theory of General Relativity, which is a more accurate description of gravity. This implied that the universe must be either expanding or collapsing. Like everyone, at the time, he assumed the universe was static and so he put a quantity into his theory to make sure the universe was neither expanding or shrinking.

    Then an astronomer called Hubble noticed that there was a direct relationship between how far away galaxies are and how much their spectrum is red shifted. People tried to come up with all sorts of explanations for this, including the idea that light somehow loses energy as travels through space. But none of these really worked. The only one that really worked was that the galaxies further away were moving away from us faster.

    This corresponded exactly to a prediction made by a Belgian physicist (and Roman Catholic priest) called Lemaitre who had used Einstein's theory to derive the relationship between distance and velocity. So people began to take the idea of an expanding universe more seriously.

    A British astronomer called Hoyle preferred a "steady state" (unchanging) theory for the universe and spent many years arguing against the big bang theory. He actually came up with the name "big bang" as a snappy description in a BBC radio program in the 1950s. He was also very good friends with Lemaitre.

    For a long time no one was sure if the steady state or big bang theory was correct. There was a lot of discussion and debate.

    Then a couple of astronomers/physicists (Penzias and Wilson) from Bell Labs were trying to track down some noise in their radio telescope. They tried all sorts of things (including cleaning all the bird poop off the antenna) but couldn't get rid of the noise. Eventually, they realised that it was the remains of the light that was released when the universe first became transparent (red shifted all the way to microwave frequencies).

    That was the clincher. After that almost all scientists accepted the big bang. A few people, like Hoyle and others, continued to argue against it. But the evidence by then was overwhelming.
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    Without wishing to overstate my case, everything in the observable universe definitely has its origins in Northamptonshire -- Alan Moore
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