| THEORIES WITH PROBLEMS - THE BIG BANG THEORY -> red shift/big bang | Start A New Topic | Reply |
| Post Info | TOPIC: red shift/big bang |
| Posted By: james Posted On: Sep 1, 2004 Views: 1182 | red shift/big bang in the text, i red the statement- In the 1920's Edwin Hubble observed that nearly all galaxies show red shift. This indicates that the galaxies are all flying away from *us* , as in a Big Bang explosion. I dont beleive the universe is flying away from US because- - we are (most probably) not in the centre of the universe. - if it would be anywhere it would be in the centre of the universe (i think) because everything would be one ended in the expansion thing. *** mind you i'm only 15 so i'm probably wrong but now you have something to think about! |
| Posted By: Keith Mayes Posted On: Sep 10, 2004 Views: 1177 | RE: red shift/big bang Hi James, No one is saying the earth is at the centre of the universe, that would be very unlikely. However, because the universe is expanding ALL galaxies (except those close together and gravitationally bound) are moving apart from one another. This is stated under the heading RED SHIFT on the main page, as quoted here: "2) Expansion of the universe. Einstein's famous equations show that the universe should be expanding, not because the galaxies were moving through space, but because the 'empty' space between them (spacetime) is expanding. This cosmological redshift results because the light from the distant galaxies is stretched by the amount that space expands while the light is en route to us. This also reveals that the Earth is not at the centre of the universe with all the galaxies moving away from us, but that due to the expansion of the universe, all the galaxies are moving away from each other, like painted dots on a balloon moving apart as it is inflated." Hope that clears it up for you. Thanks for your posting. Keith |
| Posted By: JJ Posted On: Sep 10, 2004 Views: 1172 | RE: red shift/big bang The way I understand it the universe doesnt have a centre |
| Posted By: thief Posted On: Sep 12, 2004 Views: 1163 | RE: red shift/big bang The universe has a centre but it is impossible to find it. I might be wrong so please tell me if i am. |
| Posted By: Keith Mayes Posted On: Sep 13, 2004 Views: 1161 | RE: red shift/big bang Hi thief, According to the experts the universe does not have a centre. They explain this by saying that in the same manner the surface of a sphere does not have a centre. I don't see how that explains anything personally. However, I have a problem in getting my head round the universe not having a centre. One theory claims that the universe may re-collapse into a Big Crunch (since out of favour as the rate of expansion appears to be accelerating) and where it crunches I would consider that to be the centre. This should, I would think, also be the same point where it all expanded out from in the first place, the centre? All very confusing. Keith |
| Posted By: Helms O. Posted On: Jan 12, 2005 Views: 1074 | RE: red shift/big bang Now, when there is an explosion in space, let's say a spaceman explodes a firecracker in space, then the particles go in all directions at a constant speed though. Because all explosions only apply a one time single force and the particles do'nt keep on accelerating. Now applying that fact, why after the Big Bang do the galaxies keep on accelerating faster and faster the further away they are from us. Also, when objects are observed 15 billion light years away, that,s how we see it where it was 15 billion years ago. Now, that means the universe was already expanding 15 billion years ago.So that object today, if my math is correct( if it's moving away from us about 10% the speed of light)should be at least travelig close to the speed of light, and at least hundreds of billions of years away from us.Am I missing something? Please Explain. |
| Posted By: vicbee Posted On: Feb 16, 2005 Views: 1037 | : red shift/big bang We have all heard over and over again about the big bang exploding outward, etc, etc, with us on the leading edge with each and every thing getting farther away from every other thing causing the red shift. You can visualize us on the outside surface of a balloon that is being blown up. I had a retired high school teacher explain this to me in excruciating detail and then repeated it all back to him. He said I had it. Then I asked the question that made his chin fall down to his chest. The question is, IF THERE WAS A BIG BANG, ETC., WHERE IS THE RESULTANT BIG HOLE? His expression made my day!! |
| Posted By: spencer Posted On: Mar 2, 2005 Views: 1028 | RE: red shift/big bang if they look at the universe as a sphere and the universe is the outside of the sphere with no center and no edges, then how can they say there is no center becuase a sphere has a center. think about it. when the big bang accured it probably didnt explode outward leaving just one ring of stars and galaxies it scatered them all evenly (more or less) creating the "sphere". thus there has to be a center because the center is exactly at the point where the big bang happened, where the frist atom or molicule or whatever created everything. which by the way i think is a load, because you cant have all of this matter from one little molicule. see if you can help me understand this. thanks |