Comments on: The Infinity Paradox

By: george f batton

george f batton — Mon, 14 May 2018 06:40:49 +0000

Okay so the universe might of had a beginning but what came before the beginning of the universe? The universe might have an end but what comes after it?

By: Nathan

Nathan — Sun, 11 Feb 2018 03:55:15 +0000

One paradox of infinity I never see expressed is that between two finite points, there are an infinite number of divisions that can be made, similar to the elementary principle of calculus. Between two finite points, 0 and 1, there are an infinite number of even divisions, 0.01, 0.001, 0.0001, 1×10^-100….1000….one millionth…trillionth, etc, etc. The paradox questions how can something, whether it be distance, time, or whatever, be divided evenly an infinite number of times. And this can be applied to the real world, an atom can be divided into electrons, protons, neutrons, sub atomic particles, quarks, plancks, and theoretically strings. If mathematics suggests an infinite number of divisions, why does physical matter have a finite end point? or does it? This is the only true paradox of infinity in my opinion.

By: Brian Koberlein

Brian Koberlein — Sun, 05 Feb 2017 23:13:45 +0000

Because the Universe is expanding at all points of the cosmos, not expanding from a single point. There is no center of the Universe.

By: Fabian Aldazabal

Fabian Aldazabal — Sun, 05 Feb 2017 20:59:11 +0000

If the big bang did take place, and the universe is constantly expanding as some quote, observe, then by definition why are we not capable of observing, defining the central point or área from which everything is expanding away from??

By: Brian Koberlein

Brian Koberlein — Tue, 08 Nov 2016 14:23:18 +0000

Not necessarily. It would have to have existed back then for us to see it, but it could be farther away and we wouldn’t see it.

By: Ivan Larzalev

Ivan Larzalev — Tue, 08 Nov 2016 12:56:35 +0000

Here is another paradox. If our universe is infinite long then it must be infinite old because a star that is 1 000 000 light years away from us must exist at least 1 000 000 years.

By: michael

michael — Sun, 14 Aug 2016 00:09:59 +0000

The universe is both finite and infinite depending on how you look at it. Finite in that we live inside of a nuclear explosion, but infinite if we can break out of the vacuum of that explosion into the world that explosion is taking place. Billions of our years would be but a nano second in that universe. Our universe is expanding, but will eventually collapse. If you look at our universe from the outside it is a blinding flash, not the dark night sky we see from in here

By: Jean Tate

Jean Tate — Fri, 12 Aug 2016 21:19:21 +0000

Thanks. That’s a much better explanation than my woolly “Add GR to the laws, and make the scope the whole universe, and the textbook laws need some, um, modification (or at least some caveats)”!

By: Jpatrick

Jpatrick — Fri, 12 Aug 2016 19:40:50 +0000

Many thanks for that. I’ve never seen the subject presented in quite that way.

By: K.J.

K.J. — Fri, 12 Aug 2016 17:50:17 +0000

The Universe is not a closed system. It expands, it changes. If one cubic meter space expands into two cubic meters, you have twice the amount of energy. Sean Carrol wrote a nice blog once about conservation of energy, which fit in this topic; http://www.preposterousuniverse.com/blog/2010/02/22/energy-is-not-conserved/

By: Jean Tate

Jean Tate — Fri, 12 Aug 2016 15:14:21 +0000

This may seem like a nitpick, but I think it’s not.

The parts of the universe which are ‘causally disconnected’ cannot influence each other, by definition. So at any particular location, it’s only parts of the universe causally connected to you that can enter any considerations of entropy, thermodynamics, etc. Given this, how is it possible to say anything meaningful about the entropy of the universe as a whole, or its thermodynamic state?

The universal horizon – the edge of what’s causally connected – changes; sometimes it grows, sometimes it shrinks. How does thermodynamics work in such times?

Of course, adding an assumption such as “homogeneous and isotropic” helps …

By: genialityofevil

genialityofevil — Fri, 12 Aug 2016 15:10:46 +0000

Indeed, scientists don’t know what dark matter is. If they did, they’d stop.