The count to infinity (Remember NOT to bypass the 4-word limit!)

What number should the new thread start from?

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I sleep at 11 or 12 or 3462 *the same trick*
 
3464

Lol, zanacross, I'll answer your question! You want to know what will become of the universe? Let me tell you a story. I'll try to keep it as brief and simple as possible =)

At the time of the big bang, which is considered to be the "start" of the universe, the universe had infinite density, energy and temperature; all of the matter and energy of space was contained at one point, and this point is known as a singularity. This singularity signals the breakdown of general relativity. Because of such high energy and intense gravitational pressure, the universe was forced to expand and therefore cooled as it did so. Remember – there was nothing before this singularity – not even empty space or time, as they themselves exist only within the universe. This can be an awkward concept.

Due to the presence of incredibly large amounts of energy, photons were formed. Some of the photons became quarks and then the quarks formed neutrons and more protons. With these fusing, the simplest nuclei formed due to the large amounts of energy and formed a great deal of Hydrogen and Helium nuclei. This process is called big bang nucleosynthesis. These nuclei later combined with electrons, a process known as recombination.

After a very long period of time, the atoms in the universe were fusing, forming more complex atoms all the time. Due to gravitational force, many of these atoms were eventually pulled together to form planets, stars and later galaxies.

Anyway, back to the expanding universe.

There are, in fact, three different fates the universe could have. These are known as the Friedmann models.
In the first kind, the universe is expanding sufficiently slowly that the gravitational attraction between the different galaxies causes the expansion to slow down and eventually to stop. The galaxies then start to move toward each other and the universe contracts and will eventually end in what is known as the "Big Crunch," where the universe will collapse back in on itself and return to the singularity from which it formed. The universe is not infinite in space and time, but neither does space have any boundary.

In the second kind, the universe is expanding so rapidly that the gravitational attraction of all the matter in the universe can never stop it, and therefore the universe will carry on expanding fore evermore. In this case, space and time is infinite.

In the third and final kind, the universe is expanding only just fast enough to avoid recollapse. In this case the separation also starts at zero and increases forever. However, the speed at which the galaxies are moving apart gets smaller and smaller, although it never quite reaches zero. Therefore the universe will be static; however this fate is most unlikely. With just the critical rate of expansion, space and time is infinite.

In order to find out which of these fates our universe will experience, we need to know the present rate of expansion of the universe and its present average density. If the density is less than a certain critical value, determined by the rate of expansion, the gravitational attraction will be too weak to halt the expansion. If the density is greater than the critical value, gravity will stop the expansion at some time in the future and cause the universe to recollapse.

Well, does that answer your question? :D

EDIT: I hope I remembered everything OK. :nervous:
 
3465 Looks to me that you copy&pasted that from somewhere XD
 
3466

Excuse me! I most certainly did not just copy and paste that!!! I just spent ages on it. Anyway, I couldn't find any decent separate pictures of the Friedmann models on Google images so I just drew them myself on paint. (And yes, I drew them myself, lol. You can sort of tell because they're really rubbishly drawn, but never mind.)

[PokeCommunity.com] The count to infinity (Remember NOT to bypass the 4-word limit!)


[PokeCommunity.com] The count to infinity (Remember NOT to bypass the 4-word limit!)


[PokeCommunity.com] The count to infinity (Remember NOT to bypass the 4-word limit!)
 
3467 oh and excuse me is this the astronomy lecture or the count to infinity thread? XD ( I like your previous explanation better )
 
3468
Lol, yeah, sorry. I was trying to answer a simple question and got a bit too carried away. XD
 
3470
Woot new wireless mouse and keyboard and what is the universe expanding into??
 
3471. I've been gone for a little while again. And now I
Spoiler:
came back on my own free will. And did somebody say woot? :D
 
3473
Just got home from school. I'm not supposed to be on I'm having a lot of fun.
 
xD I got home like 2 hours ago. 3474. 3 + 4 = 7! :P
 
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