What Was Happening Before the Big Bang?

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MonkeySpanksays...

You should check out PBS Space Time on YouTube then

I love Brian; he is a pillar of the physics community. However, in the interest of time, he only got into Hawkin's shuttlecock interpretation.

There are others such Paul Steinhardt Eternal Inflation, and the universe being born out of black/white hole as described in the Penrose diagrams.

General relativity math is solid, but no one really knows how to interpret the singularity (if there is such a thing).

lucky760said:

Totally agree.

This is extremely fascinating.

*quality

robdotsays...

The universe contains all that exists. That is actually the definition of the word. Look it up. So,there is no such thing as anything,outside of the universe. Also,all current data and models proclaim that the universe is the same everywhere,even outside the observable universe. So at several points he contradicts all known data and models.

vilsays...

Lemme watch that again. Ok so "our part of space", "cosmological realms" and two simplified versions of what the phrase "before the big bang" might even be considered to mean. Some tame speculation about dark energy and gravity. No universes. Are you sure you watched the video?

robdotsaid:

The universe contains all that exists. That is actually the definition of the word. Look it up. So,there is no such thing as anything,outside of the universe.

BSRsays...

If there is no such thing as "anything,outside of the universe" then the universe does not "contain" anything. So, the universe IS everything, unless there are multiple universes. Multiverse.

robdotsaid:

The universe contains all that exists.So,there is no such thing as anything,outside of the universe.

robdotsays...

Yes,the universe contains all that exists.

BSRsaid:

If there is no such thing as "anything,outside of the universe" then the universe does not "contain" anything. So, the universe IS everything, unless there are multiple universes. Multiverse.

newtboysays...

Ok...but we don't really know if one exists.
If there is a multiverse, even just a quantum multiverse, then there is no universe.
Subatomic particles wink in and out of existence. This at least hints at some place outside the "universe", which if correct means there isn't one.

robdotsaid:

Yes,the universe contains all that exists.

robdotsays...

There is no observational evidence for any multiverse. The universe is the totality of existence. The universe,contains all that exists. That is actually the definition of the universe.

newtboysaid:

Ok...but we don't really know if one exists.
If there is a multiverse, even just a quantum multiverse, then there is no universe.
Subatomic particles wink in and out of existence. This at least hints at some place outside the "universe", which if correct means there isn't one.

newtboysays...

Many aspects of quantum mechanics are observational evidence (not proof) of somewhere outside our observable "universe". I gave an example. Matter springing out of nothing, and returning to nowhere are indicators of "somewhere" else....conservation of mass demands it.

Yes, that's one definition of the word, (edit: The Universe (Latin: universus) is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. There may be more than spacetime, or something that's not matter or energy, or something outside the limits of our expanding but finite "universe" .) ...that doesn't make the concept correct anymore than saying "God is omniscient" makes it true or proves God's existence.

If there is a universe, it contains all. That statement doesn't prove there is one, neither does our inability to prove it one way or the other....yet. "Universe" might turn out to be a narcissistic concept born of ignorance...we just don't know. Your opinion/best guess/assumption stated as unassailable fact shows me you aren't (being) particularly scientifically minded. You may be correct, but there's no way to know with our current understanding of physics.

robdotsaid:

There is no observational evidence for any multiverse. The universe is the totality of existence. The universe,contains all that exists. That is actually the definition of the universe.

BSRsays...

CONTAIN: have or hold (someone or something) within.
"coffee cans that once contained a full pound of coffee"

WITHIN: inside (something).
"the spread of fire within the building"

Anything with an inside must have an outside, no?

As I see it, the universe is contained within a skull. Outside that is the rest of you. That sun you see in the sky is a part of you. Without it, you die. It's an external organ for all that is you.

BTW... Before the Big Bang? Foreplay.

robdotsaid:

There is no observational evidence for any multiverse. The universe is the totality of existence. The universe,contains all that exists. That is actually the definition of the universe.

eric3579says...

My take on the word universe... When i hear theoretical physicist and astrophysicists use the word, they are most always (from what i've observed) referring to our universe. The one created by the big bang. The word universe meaning is and has evolved and will probably continue to evolve in the future. Really depends on who is using it. Seems to me many laypersons use it different than those who study it. Always important to be on the same page regarding words meanings when trying to discuss such topics. Also i'm no pro, just a fan

ChaosEnginesays...

Yes, and marriage meant "man selling his daughter to another bloke" and decimate meant "to kill 10% of a roman century (which meant unit of 100 soldiers as opposed to unit of time)".

Definitions change, language evolves .... move on.

robdotsaid:

There is no observational evidence for any multiverse. The universe is the totality of existence. The universe,contains all that exists. That is actually the definition of the universe.

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