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Old 01-17-2008, 02:47 AM   #46 (permalink)
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Maybe it was a huge intergalactic moth?
Wow , and maybe Ronald Reagan knew more than people gave him credit for , when he said , the planet could unite if an alien invasion were to happen , so lets build a giant fly ( moth ) swat , called Star wars defence system .

But hey , you never know
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Old 01-17-2008, 04:54 AM   #47 (permalink)
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I asked that same Q Dave i said how can space be expanding , i thought the matter in it was , but alas i was told i was wrong by Ooe , and Dalem .
We don't know what space is expanding to mainly because we cannot see beyond the universe. There is no light there for us to see and thus, we cannot see. We do know that the universe is expanding at the speed of light.
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Old 01-17-2008, 06:56 AM   #48 (permalink)
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witnesses also see david coperfield move an island, so is it the case?
He moved some ladies to his dressing room as well didnt he ? only they never disappeared
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Old 01-17-2008, 07:03 AM   #49 (permalink)
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We don't know what space is expanding to mainly because we cannot see beyond the universe. There is no light there for us to see and thus, we cannot see. We do know that the universe is expanding at the speed of light.
.

And that is the Q is it not Col , that space is infinite , it goes on and on forever thats why i can not grasp the concept that space is expanding , but i accept the matter in it is .
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Old 01-17-2008, 13:11 PM   #50 (permalink)
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Well, space according to the math is not infinite. It's just very, very big and according to Einsteinian physics, it is actually curve. Point in any direction, go long enough and far enough and provided nothing moves, you will come right back to where you started.

I know this is like an ant not understanding about the world being round but if the ant start walking in one single direction and keep at it, it will come back to his original spot.

Same kind of thing here. I have to admit that when I took the course that I stopped trying to picture things as they appear and concentrated on the math. It is alot easier to understand that multiply 10 x 10 is 100 than to try to count things through one at a time.
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Old 01-17-2008, 13:15 PM   #51 (permalink)
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I've wondered if it's possible there's multiple universes. Not alternate universes, but rather multiple universes like there are multiple galaxies within the universe.
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Old 01-17-2008, 13:37 PM   #52 (permalink)
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That only works if it can be proven that we are on the surface of a sphere as opposed as being inside the sphere. If we are inside the sphere then, we cannot end up where we were in the first place. We will just reach the wall of the sphere and there will be a little sign that says, "You cannot go any further."
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Old 01-17-2008, 13:42 PM   #53 (permalink)
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A mile long and half a mile wide, no rivets or seems to be seen through the scope of a hunting rifle, sounds to me like the moon shine was of a drinkable type.

It could be one of those weather balloons that the local Boy Scouts group have taken to using.

Or maybe they just wanted to drum up some tourism.

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Old 01-17-2008, 13:49 PM   #54 (permalink)
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According to theory, space is believed to be filled with dark energy. Where there is absence of dark energy, there is no space. When dark energy expands, space expands.
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Old 01-17-2008, 15:03 PM   #55 (permalink)
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That only works if it can be proven that we are on the surface of a sphere as opposed as being inside the sphere. If we are inside the sphere then, we cannot end up where we were in the first place. We will just reach the wall of the sphere and there will be a little sign that says, "You cannot go any further."
Spheres are 3 dimensional objects. Space is actually 4 dimensions (well, the math shows more than 4).
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Old 01-17-2008, 15:54 PM   #56 (permalink)
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Spheres are 3 dimensional objects. Space is actually 4 dimensions (well, the math shows more than 4).
Ok the 4th dimension is time. But how do we visualize it in 4 dimensions. The only way I can think of is taking snapshots for every second of time and put together snapshots to get an idea of it. Now what is the 5th, 6th dimension and how do we observe it?
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Old 01-17-2008, 16:01 PM   #57 (permalink)
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Ok the 4th dimension is time.
Well, no.

Fourth dimension - Wikipedia, the free encyclopedia

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Now what is the 5th, 6th dimension and how do we observe it?
At that point, I gave up trying to visualize it and just try to do the equations. It was a lot easier saying X^Y than try to picture what Y is.
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Old 01-17-2008, 16:11 PM   #58 (permalink)
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Dark energy a furphy, says new paper

Friday, 21 December 2007 Marilyn Head


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'Dark energy', which researchers have spent years trying to fathom, isn't necessary to explain our universe after all, according to a new solution to Einstein's theory of general relativity.

This challenges the notion that dark energy makes up 76% of our universe, as many cosmologists believe.

Research by Dr David Wiltshire, from New Zealand's University of Canterbury, accounts for recent observations of the distribution of matter in the universe, observations that hadn't been made in Einstein's time.

Wiltshire's paper, published this week in the journal Physical Review Letters, focuses on the lumpy distribution of matter in the universe as it evolved, rather than a smooth distribution that Einstein assumed.

Once this uneven distribution is taken into account, he says, we don't need dark energy to explain the accelerating expansion of the universe.

"Dark energy, this mysterious stuff in the vacuum of space which makes the universe want to accelerate, is the basis for standard cosmology today because it explains much of what we see," says Wiltshire.

Galaxies do appear to be moving away from each other and at an ever increasing rate, he says.

But he says this acceleration is apparent, and whether you see it or not depends where in the universe you are taking measurements from, a void or a galaxy.

The matter with matter

When cosmologists first solved Einstein's equations 80-90 years ago, they didn't know how matter was distributed or what the universe really looked like.

"The early solutions, which standard cosmology still uses, assumed a very simple structure where the universe is uniformly smooth and featureless, evolving the same way in all directions," says Wiltshire.

But he says through observational projects like the Sloan Digital Sky Survey and the 2 Degree Field survey, we now have a much better picture of the large-scale structure of the universe and we know that galaxies are not uniformly distributed.

"Rather, they are in clusters sprinkled thinly in filaments and 'bubble walls' surrounding huge voids hundreds of millions of light-years across," he says.

This complicates a standard view of the universe.

"Space curves around a massive object, just as a rubber sheet on a trampoline will stretch around a heavy cannon ball, and time slows down," says Wiltshire.

But he says this only represents bound systems like galaxies.

"The flat edge of the rubber sheet is the reference point for our clocks. It is only the space beyond this flat edge that is expanding. Clock rates and the curvature of space can both vary gradually as you move across an expanding void."

And, since mass slows down time, the clocks of observers in voids, where most of the empty space in the universe is, will appear to be ticking faster than the clocks of observers in galaxies.

It is this last feature, he says, that explains why dark energy is unnecessary.

"What we see as cosmic acceleration is an apparent effect, which begins when voids open up. When the universe was very young all the clocks were synchronised but because of the way voids have evolved, the clock rate is variable today," Wiltshire says.

Age is relative too

The age of the universe also depends on where you're standing, as Wiltshire discovered in calculations published in the New Journal of Physics.

The universe is 14.7 billion years old, a billion years older than the currently accepted age, from our galactic observation point.

But it is more than 18 billion years old from an average location in a void.

In a third paper, published this week in Astrophysical Journal Letters, Wiltshire and colleagues examine independent observational tests that confirm these ages.

Although the research completely changes our view of the universe, it doesn't alter standard physics.

"Einstein's revolution is still continuing," says Wiltshire. "This is a radically conservative solution to how the universe works."
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Old 01-17-2008, 23:26 PM   #59 (permalink)
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Thats exactly why i dont Expat ?

But Hey , you never know. ,

Imagine the scenario , we get visited , or not ? now then , IMAGINE there is a planet , zillions of light years away , occupied by the most advanced civilization in the universe , they have eradicated all disease ,pestilence ,famine , and wars, they live in peace and harmony , they have conquered space travel and can go anywhere they wish faster than the speed of light , Einstein wasnt born there do you think they will have ,and worship, the same Gods as we seem to have on Earth ,if they are the Grey,s we hear so much about , why were they not made in Gods image ,or maybe they were ???? just like we were , but some of us came out of Africa and turned white and some turned yellowish with eyes that are a different shape to Europeans ? and some brownish , and some stayed Gods color , Black ? if the historians and anthropologists and (Darwin) have it correct that we all came from Africa and were made in his image (God that is ) ,, Ahh but which God do we mean , our God or :their God : or one of the many Gods that spring up all over the place ?

But hey Expat , you never know ?

I don't believe in god exactly like the books say. I just kinda think that maybe someone or something is watching. Maybe some super evolved thingo that is just energy but is aware and can influence? I have no idea, I'm not dead yet but when I am I'll see what I can do to post my findings....

I love this topic especially because it confuses the hell out of me. It's so hard for me to wrap my head around infinate and what is on the other side of the universe and all the possiblitites!! I really do hope we get reincarnated or something because I want to see it all!!!

Keep the theories and links coming, this is a fun read.

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Old 01-18-2008, 01:16 AM   #60 (permalink)
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Hey! Thanks for the link! You have no idea how much of a help it was! It greatly clarified the concept and now I can see where they are going with this. They are basically saying that as long as you can keep adding more lines to each vertex node that makes it uniform, you have basically discovered a new dimension. That image of the tesseract has greatly aided me in understanding the concept of the fourth dimension. Now the next question is: how the hell we do observe it and measure it and make it something tangible? Unless we can do that, all of this is purely theoretical conjecture, abstract. But I can see how people can argue that the universe is basically a curve sphere and that if you go far enough you will end up where you belong. If that's the case, we need to find our fourth dimension version of the shortest distance like a curve on the surface of the sphere is the shortest distance where a straight diagonal is the shortest distance on a plane. It seems that in order to get the shortest distance, we have to somehow step out of the box, if you will.

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At that point, I gave up trying to visualize it and just try to do the equations. It was a lot easier saying X^Y than try to picture what Y is.
That means, it will remain abstract and theoretical unless we can discover an object that is 4 dimension and directly observable.
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