Author Topic: Big Bounce?!  (Read 662 times)

Sriram

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Big Bounce?!
« on: December 24, 2020, 02:46:12 PM »
Hi everyone,

Some people don't seem to agree with the Big Bang, Cosmological Inflation, Space-time being created at the Big Bang etc.....

https://www.bbc.com/future/article/20200117-what-if-the-universe-has-no-end

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The usual story of the Universe has a beginning, middle, and an end.

It began with the Big Bang 13.8 billion years ago when the Universe was tiny, hot, and dense. In less than a billionth of a billionth of a second, that pinpoint of a universe expanded to more than a billion, billion times its original size through a process called “cosmological inflation”.

Eventually these lumps of matter will drift so far apart that they will slowly disappear, according to some models. The Universe will become a cold, uniform soup of isolated photons.

But what if the Big Bang wasn’t actually the start of it all?

Perhaps the Big Bang was more of a “Big Bounce”, a turning point in an ongoing cycle of contraction and expansion. Or, it could be more like a point of reflection, with a mirror image of our universe expanding out the “other side”, where antimatter replaces matter, and time itself flows backwards. (There might even be a “mirror you” pondering what life looks like on this side.)

Or, the Big Bang might be a transition point in a universe that has always been – and always will be – expanding. All of these theories sit outside mainstream cosmology, but all are supported by influential scientists.

The growing number of these competing theories suggests that it might now be time to let go of the idea that the Big Bang marked the beginning of space and time. And, indeed, that it may even have an end.

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Cheers.

Sriram

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Re: Big Bounce?!
« Reply #1 on: December 26, 2020, 09:28:18 AM »
Some people don't seem to agree with the Big Bang, Cosmological Inflation, Space-time being created at the Big Bang etc.....

The 'big bang theory', which is firmly established science, only deals with the development of the universe from a hot dense state some 13.8 billion years ago. As we get further back towards the point at which the equations of general relativity become singular (within fractions of a second), the less certain things become. There are many, many hypotheses, based on different assumptions, about what happened at 'the start' and (in some cases) before.

I posted a series of videos on this subject here: Before the Big Bang.
x(∅ ∈ x ∧ ∀y(yxy ∪ {y} ∈ x))