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Is the universe infinite? 
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#37
Jan1611, 03:46 AM

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#38
Jan1611, 04:06 AM

P: 2

do anybody find the greatest number, so why tell that universe in finite?



#39
Jan1611, 05:40 AM

P: 9

Olber also had a counterargument to that. He stated that the light from the distant stars would be dimmed since the matter between those stars and us would absorb the light. But that was wrong, because then, that matter would eventually heat up and shine like the stars. But what Obler did not consider was that the stars had not been shining forever, but were formed at some point in time(finite time). 


#40
Jan1611, 07:03 AM

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#41
Jan1611, 07:26 AM

P: 9

Olber's Paradox has been confusing people ever since. It has just been a huge mix up, and it really bugs me. I believe everyone should be informed that it is absolutely wrong. 


#42
Jan1611, 10:47 PM

P: 1

If this is the case I don't see why the expansion of the universe has anything to do with the fact that stars do not cover the sky entirely at night (presuming the universe is indeed infinite). Obviously as new stars ignite far far away from us, the light that they produce will not reach us in a long time  but that is of course not due to the expansion of the universe. Pardon my french, I have just recently gotten an interest in cosmology and I am pretty much clueless on all these subjects. 


#43
Jan1711, 12:13 AM

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You can solve this paradox in three ways: 1. Allow the universe to be finite in time. In such a universe, light wouldn't have had time to come from every location in the universe yet, as you mention. 2. Allow the universe to be finite in space. In such a universe, obviously not all directions would necessarily point to some star or other, since there would be a finite number of them. 3. Allow the universe to expand with time. In such a universe, the light from furtheraway stars is redshifted more, such that the temperature of the night sky is only affected by the most nearby stars, which are also finite in number. 


#44
Jan1711, 12:43 AM

P: 2

we know number system, but we don't know the smallest and largest number. We dont know the limit of universe, so why we say that it is finite.................



#45
Jan1711, 09:16 AM

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#46
Jan1711, 11:35 AM

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#47
Jan1711, 11:52 AM

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#48
Jan1711, 11:57 AM

P: 711

Perhaps instead we can view the expansion as creating new separate island universes no longer connected to our own? Or to coin an old term, other dimensions.. And an infinite number if them no less.



#49
Jan3011, 12:06 AM

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#50
Jan3111, 02:48 PM

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#51
Feb111, 04:51 AM

P: 6

I await with trepidation further posts informing me that I am talking Bol*@ks. lol. Regards, 


#52
Feb111, 06:00 AM

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#53
Feb211, 04:26 AM

P: 6

It is 'space' which appears to be expanding. If it was matter expanding then our galaxy would be getting bigger (which it's not). Matter is being 'carried' along with the expansion of space which is why everything we see appears to be moving away form everything else. Hey... maybe I know a little more than you think! lol. So, my point still stands...How can the universe be infinite if it's expanding? Cheers, 


#54
Feb211, 02:48 PM

P: 140

now look at the set 1, 5, 10, 50, 100, 500, 1000,... that is also infinite Now there are more numbers between 1 and 1000 than there were in the first set. 


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