Where did the big bang happen?

 Where did the big bang happen?

 When did the big bang happen?

 What is outside the universe?

 Where is the universe?

 How big is the universe?

 To get answers to all the above questions, we first need to understand the following theories.

 Bubble Universe:

 According to this theory, apart from the bubble of our observable universe, there may be other cosmic bubbles that exist at an infinite distance from each other, which have their own basic laws of physics.

String Theory:

 Given the multidimensional aspect of string theory, the possibility of multidimensionality of the universe is assumed, the precursor of this theory may be that there are more dimensions in addition to the three known dimensions in which more separate universes exist.

 Nine Boundary Theory:

  According to this theory, when the formation of our universe began, when the Big Bang happened, it may not be the only Big Bang at that time, but more Big Bangs also happened with it.

Oscillating Universe Theory:

 According to this mathematical module theory, the universe has always been formed and ended in such a way that after the Big Bang, it expanded rapidly and after billions of years of extreme expansion, it began to shrink again, gradually shrinking and shrinking again to a point.  And then the expansion started again with the Big Bang and it has been happening continuously.

  Multiverse Theory:

  According to this theory, it may be that our universe that we observe is not a single one, but there are many separate or interconnected extra-dimensional universes within which their own cosmic laws are applied.

Where did the big bang happen?

 "Where" refers to the place and the location. The answer to the question of where the universe was from the tiny tiny point when it suddenly began to expand at a rapid rate is very simple.  It is (relative) which means that a reference point is needed to determine its position. Suppose you are transported to an infinite space, how will you determine your position?  How do you determine where you are?  Of course, you cannot determine your location without a separate reference point, now if there is a space shuttle on in front of you, you can now determine your location to some extent by making this shuttle a reference point.  How far are you from this shuttle and on which side is the shuttle from you?

We are ignorant of the conditions before the Big Bang because the laws of the universe were set after the Big Bang.  There is no reference point to determine the place of occurrence of the big bang, on the basis of which we can determine where the big bang happened.

 When did the big bang happen?

 The answer to this question is that the Big Bang happened about 14 billion years ago, we can answer the "when" in this question by sitting inside the universe, but we cannot answer it by sitting outside the universe.  The "when" after the Big Bang is inside the universe not outside the universe.  It seems to be about 14 billion years old.

Beyond this point, all cosmic laws cease to exist and time ceases to exist.

 In this very small and very dirty point, the model of the universe breaks the laws of physics and makes it impossible. According to the model of this point, the laws of physics are impossible at this point.

 We know only so much about the timing of the Big Bang that we cannot date it by reference to other events.

 What is outside the universe?

 The question "What is outside the universe" is actually the same as the question "Where did the Big Bang happen?"

 When we ask where the universe was as a very beginning and tiny point before the time of the Big Bang, then we are actually looking at the location and location of the universe in that state about 14 billion years ago.  When we ask the question, what is outside the universe, it is actually a new form of the previous question, where is the universe at this time?

So the answer to this question is the same as the question "Where did the Big Bang happen?"

 We can't get out of the vastness of the universe, we can't even get close to the edge of the universe because the universe is constantly expanding at a speed greater than the speed of light and everything that exists inside the universe is going far the speed of light. Therefore, we may never be able to look outside the universe.

 Where is the universe?

 The answer to this question is the same as the question "What is outside the universe?".

 We don't know if there is anything other than the universe or not, we don't know if our universe is alone or not?

 Therefore, we are completely unable to describe the location of the present universe.

 We do not have any scientific model on the basis of which we can make the location of the universe.

 How big is the universe?

This question is very difficult. According to all available scientific info, scientific models and mathematical models, the universe is about 90 billion light-years in diameter.  It has been only 14 billion years, at that time the light reaching us from the corner of the universe has reached us from a distance of about 14 billion light years.

 We are still unable to accurately model the full potential of the universe, so we may never know how big the universe is.