Space Fan News #13: Before the Big Bang?
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Back from vacation and wanted to talk about Conformal Cyclic Cosmology. Back in November, a group announced that they have possibly detected gravity waves from interacting black hole in a universe prior to ours. Here is the paper: http://arxiv.org/abs/1011.3706 And their response to some of the criticism: http://arxiv.org/abs/1012.1486 BBC News announcement: http://www.bbc.co.uk/news/science-environment-11837869 Physics World: http://physicsworld.com/cws/article/news/44388 Wikipedia link: http://en.wikipedia.org/wiki/Conformal_Cyclic_Cosmology
Comments
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No no no, the CMB is not from the event of the big bang, it is from recombination, the time when hydrogen atoms first formed, nearly 400,000 years after the universe began. Minor detail.
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It's hard to think that there was once nothing.
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it's mind boggling
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Why does anything even exist. Why couldn't there just be nothing at all. Not even energy. Maybe its just impossible for energy not to exist. How far could we go back in time to reach the absolute beginning. Once it is reached is there anything beyond that? Perhaps we are in a sub-dimension inside a superior dimension.
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If you think about it from all the scientific data up to date this theory is actually quite plausible!
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This is not something new. The idea of a universe that is infinite in time has existed long ago. Stephen Hawking somehow disproved it. I don't know how but he did. Maybe he was wrong.
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I just saw this for the first time. It only raises so many more questions and hypotheticals. I reflect on how far we have come in our technological phase, ie last 200 years? I think the only reason the universe would have re-banged is if (a) we evolved to other dimension and let the universe continue in its cycle, or (b) we became all knowing and let it continue it's cycle. is there a hidden message in these grav waves?
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A universe still had to start from nothing which means at one point there was nothing at all for an infinite amount of time then the big bang happened. If the cycle does exist than we can see how many times this cycle has gone and what happened in the previous cycles. What I'm saying is something had to come from nothing.
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Just letting you know the cosmic microwave background dates back NOT to the very begining of our universe but 350 000 000(around then) years after the big bang when the pulse of light was emitted through the cosmos. kk. i do like your videos though :)
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does the duck phone quack when it rings?
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thanks for the vidzzzzzzzzzzzzz i watch all of your videos
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You should make an audiobook or something, that i could listen to while going to sleep TD.
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@Tarlev The Big Bang Theory does not hold that everything came from nothing. It posits that before the universe inflated everything was condensed into an infinitely tiny point, a singularity, kind of like a black hole. The word "center" implies finite boundaries, but the Universe may not be finite. Imagine a sphere. There is no "center" on the surface of the sphere. It wraps around on itself; it is infinite. We humans have a hard time getting this because we experience a finite, 4 dimensional wo
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@brazentongue I follow what you say 100%.. But like many others say here, "how can everything come out of nothing?" So if the universe doesnt have a center, there must have been something, prio to the big bang, or inside the big bang, forcing it to expand only one direction. I'm probably way off to, guess I dont understand the meaning of this so called "universe"
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how can something come from nothing?......it can't (string theory)
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how can something come from nothing?......it can't
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@Tarlev I'll take a stab at this. The term "Big Bang" is misleading because it wasn't an explosion like you understand a bomb. The Big Bang Theory actually says that the universe (that is, space itself) INFLATED nearly instantaneously, rather than exploded. There was no "space" outside of the universe, so there was no "center". The idea of center or middle is concerned with the three spatial dimensions WITHIN the universe. I could be way off. I'd be interested to hear other responses.
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What's with the fancy duck in the background? kk
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@tdarnell You say here the universe dont have a center? How can you be certain about this when the most logical explanation how it came to be, is from the big bang? which mean the expansion must have a center/starting point. The only reason to me for the universe not having a center would be if something was preventing it from expanding in a circle, and only letting it expand one direction
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Thank you, I enjoy your videos.
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