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How big is the universe and why does it exist at all?

Updated: 8/18/2019
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Q: How big is the universe and why does it exist at all?
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What facts are there that aliens exist?

... im thinking... Universe is big.


What exist before bangs?

according to me , minakshi one universe exist before the big bang .


How was the very small and very hot universe bubble born before Big Bang?

It wasn't. The Big Bang was the beginning of the universe; the universe didn't exist before then.


How do cycles affect the universe?

No. Universe A expands from a 'Big Bang' stops expanding, and contracts until there is a 'Big Crunch'. Then there is a new big bang and the beginning of Universe B, a middle, and another big crunch, a big bang with Universe C and so on. At the time of any 'big crunch', all matter and energy from that universe ceases to exist. It cannot manifest itself until after the next 'big bang', and then has no relation to anything in its previous manifestation.


What theories about the past present and future of your universe exist?

big bang theory


What best describes the universe before the Big Bang for a k12 student?

The universe did not exist before the Big Bang. There was nothing there. It can be hard to grasp for young minds.


The totality of all things that exist is called what?

The only word we can think of is "Universe". But if that's the one the question isfishing for, then its description is much too restrictive. The Universe is not only thetotality of all things that exist. It also includes all of the space in which they haveever existed or could exist, as well as all of the time in which they have existed,do exist, or will exist. Now that's a Universe.


What will happen if there is no hydrogen?

If there was no Hydrogen, the universe would not exist, since Hydrogen was a catalyst of the Big Bang and it is the one-proton building block of all other things.


What country do LEGO universe memberships exist?

Members of Lego Universe live all over the world!


Why does anything exist?

Maybe nothing does exist; maybe it is all in your consciousness and you're just imagining it, and when you stop thinking it stops existing... Can you really tell it continues to exist? Anyway, there is no real proven answer, it depends on your religion for example. The big bang theory may have created the universe, but how did that start? If you're a Christian, God created the universe, for example.


What the difference between universe and galaxies?

A universe is a very big realm of darkness with galaxies in it. and there are billions of galaxies in the universe! One of those galaxies is our solar system, and in that solar system is our planet. There probably is even more then just one univserse. O_o Well... Galaxies are within the universe and a universe is defintly bigger then a galaxy


What would happen if there was no blackhole?

If there is no black hole, then no Universe, we will not be exist. That's why there is a Big Bang. The Universe started off with a Big Bang from a black hole. Though if you want to know what happens before our Universe, then you need to study 'String Theory' and the 'M theory'.