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satyaraj
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can anyone explain me about the bigbang singularity
Crazy Tosser said:All matter was concentrated in a point and then time began?
kev said:If we define time as change, then requiring the universe to change from a state of having no time to a state of having time, requires having time in the first place for the change to happen. If I say something like there was no time before the big bang, it is self contradictory because the word 'before' is a temporal word and requires a concept of time to have any meaning. The same is true for words like ''was', 'then' and 'began'.
Crazy Tosser said:Yes, but Big Bang was the very first change of state. Even though I see your point, that nothing can "begin" if there is no time, but I think it wouldn't be wrong to say that the first process that occurred in the universe - BB - was the beginning of time, because it cannot possibly be proved that time existed before it.
then requiring the universe to change from a state of having no time to a state of having time, requires having time in the first place for the change to happen.
That comment is a bit strange. No theory can imply or refute an idea. What you said is true, but it's true in exactly the same way that it's true that Newton's theory of gravity doesn't imply or refute the idea that stuff will be falling away from massive objects tomorrow.MeJennifer said:To comment on all those "beginning of time" thoughts, GR neither implies or refutes the idea that there is nothing on the other side of the big bang singularity.
Naty1 said:... on the other hand, some theory suggests inside a black hole, space is replaced by time so the black hole singularity is located in time not space!...equally crazy, but possible, I guess...
The Big Bang Singularity is a theoretical point in time, approximately 13.8 billion years ago, when all matter and energy in the universe was compressed into a single, infinitely dense and hot point.
The Big Bang Singularity is believed to have triggered the expansion of the universe, leading to the formation of galaxies, stars, and planets. As the singularity expanded, it cooled down and matter began to clump together, eventually forming the structures we see in the universe today.
One of the strongest pieces of evidence for the Big Bang Singularity is the cosmic microwave background radiation, a faint glow that permeates the entire universe. This radiation is a remnant of the intense heat of the singularity, and its uniformity supports the idea of a single, explosive event.
The Big Bang Singularity cannot be directly observed or recreated, as it is thought to have occurred in a time and space beyond our current understanding. However, scientists can study its effects and make predictions about its properties through observations and experiments.
The Big Bang Singularity is currently the most widely accepted theory for the beginning of the universe, based on a large body of evidence. However, there are other theories, such as the steady-state theory and the cyclic model, that offer alternative explanations and continue to be studied by scientists.