QUOTE(LarryOldtimer @ Aug 15 2005, 12:24 AM)
The problem is, I have no idea of just where that truck actually came from . . . The situation is even worse with the universe. All we know about it is what we can see with telescopes and the naked eye (as to position et. al., of stars) And the trouble with that is that we don't have a clue (well, perhaps some speculation) as to where any of those stars we see really are.
Actually, you left out a very important clue. The distance between galaxies is increasing in all directions, and not from any one specific point. It is this piece of data that indicates that the universe is expanding, as opposed to galaxies and such simply moving away as from an explosion. It is because the distances are increasing but the actual galactic objects themselves are not, that we can claim that things are expanding away from one central point, not moving from one central point.
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Moreover, even the distance away from us is only apparent. We can only tell for sure, since light does have a velocity of travel, and presumable travels in a straight line (except where it does get bent by gravity), is where those stars were when they emitted the light we see now. If the star was 3 billion light years away from where we are now when it emitted the light we see now, then its apparent position is where it was 3 billion years ago, not where it is at the present time.
Right, That is why we use the proportions and ratios, rather than actual physical locations of the universe. It doesn't matter where the stars were 3 billion years ago, but rather what the ratio of its distance to velocity, is compared to another star.
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And if there is truly an expanding universe, then all stars of a certain apparent distance would have to all be on one side of the earth, the side in a straight line towards the point of singularity. The universe was supposedly considerably smaller then, and earth would be now well away from that earlier universe (I am using the term universe to include all stars in existance).
No, no...
let me think here...
Objects in the universe are not moving through space away from each other (I'm talking in terms of the Big Bang, not about galaxies and such migrating through the universe, which of course they do). It is not the galactic objects that are expanding, but the universe itself that is expanding, and moving the objects with it as it does.
Did that clear it up a little? This is a very important point that needs to be clearly understood in order to realize why a singularity is the logical expected origin of the Big Bang. If anyone has any questions about this point, about how the universe is expanding, but the actual objects within it aren't moving, please ask.
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The expanding universe theory is not based on direct observation of the actual movement of stars, but is derived from primarily the red shift. It is impossible to directly measure the movement of stars, because the closest is still way to far away to measure any discernable change in angle over time.
Again, it is not the physical distance that matter, but their movement as measured by velocity and distance. It is the ratio we are interested in, not the mileage.
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It may not be all speculation, but there are a load of assumptions in the theory, any of which may not be correct. Assumptions tend to make an ASSoutofUandME.
We...haven't actually gotten to the assumptions yet. This is all fairly direct and objective stuff.
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Interesting theory and certainly fun to discuss, but I am not completely buying into it just yet.

I have to always keep in mind that I have yet to see astronomers be right in their predictions made prior to out space craft getting somewhere and actually taking photographs and sending them back. I do have to say, astronomers have to be the most surprised people on earth, since they are always surprised by what our space craft find. What gets sent back seems never to be what they anticipated.

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Oh, no doubt...We are receiving tons and tons of new data every single time we get another mssion back on earth. I can't say I agree that our astronomers haven't been able to predict quite a few interesting things, but that is for another topic. Like I said, there is no shame in admitting what our limitations are.