Recent content by RLutz

Yes, this is what I was trying to convey. Specifically the Andromeda Paradox. Thanks, I'll dig more into it now that I have something to go off of!

I follow what you guys are saying, and it makes perfect sense (if the information of what shirt I have isn't created till I wear it, then obviously no one can see that before me). But what of the situation that I linked in the OP? http://www.kiekeben.com/relativistic.html If I'm A, C is...

Maybe I'm not phrasing it correctly. I guess succinctly what I mean is, is it possible for some distant observer to see something in MY future (what shirt I'm going to wear tomorrow)? And if it is possible for someone to see my tomorrow before it happens for me (even if there's no possible way...

This came up at lunch today when a friend of mine brought up that he had recently watched the Nova episode of Fabric of the Cosmos where they talk about spacetime as a sort of loaf where relative motion has the effect of cutting different angled slices out of the "loaf" of space time (for those...

To anyone who hasn't seen the Douglas Adams' quote before.

Hi all, I realize that things beyond our horizon are not causally connected to us and so from a scientific standpoint it is correct to say that nothing exists beyond our observable universe, but my question is more related to inflation. First, I'll explain my understanding of current...

Hmmm? The cosmological principle just says that we're not special. The observable universe looks roughly the same anywhere you look, the CMB is remarkably uniformly spread, etc. From that, it would make sense that the laws of physics are also the same wherever we look. Also, the oldest thing we...

You can rule out some configurations just by the anthropic principle. <2 dimensional beings would have a hard time pondering the nature of the universe. Even 2 dimensional animals couldn't have traditional digestive systems (as any path through them would split them in half). In other...

We live in all three of those dimensions. I can move up, down, left, right, and to, and fro. (3 independent axes). I have length, width, and height. As far as time being just another dimension, I always thought that was a decent way of thinking about it. Pretend you have a car, and that car...

See my previous post https://www.physicsforums.com/showpost.php?p=2887431&postcount=25 If Hawking is right, that would make a Planck square the fundamentally smallest region of space, and nothing could occur within that space. Check out the wikipedia articles on the Holographic principle and...

Black holes are also relevant to this issue. Black holes represent the highest possible entropy a given region of space can have, they have maximal entropy since anything one would do inside the event horizon (move stuff around, change the spin of particles, reorder your DVD library) would go...

Yes, it does mean that (at least for now--if the expansion is accelerating, then some point way into the future our galaxy will be ripped apart, then the solar system, then the earth, then this expansive force will even become more powerful than the strong force (gravity is weak sauce compared...

I'm no scientist, but I think I can answer that one. if space itself is expanding, then that means the further apart two objects are, the faster the space between them is growing. If two galaxies are pretty close by (relatively speaking) then they are not being separated extremely quickly by...

So I just finished reading Brian Greene's The Fabric of the Cosmos. All the parts before the string theory talk on inflationary cosmology were really illuminating (the stuff on Higgs fields was particularly enlightening). Anyway, I'm certainly not an expert on any of this stuff, (do the PF...

Thanks!