ramoss writes:
Red shift has been demonstrated to be caused by objects moving away. The greater the red shift, the faster the object is moving.
red shift is caused by the light waves elongating.
This can be caused by the light-emitting object moving away from the viewer.
It can also be caused by the gravity of the light-emitting object.
I am less certain, but I believe that the gravity of all the objects the light passes by on the way to the viewer "pulls back" on the light, and thus, from the viewer's perspective, stretches the light wave (making it appear redder than it should be).
I am unfamiliar with the process that can conclusively demonstrate which process is responsible for any particular light-emitting object's red shift. I'd love an informative link about it if you know of one.
ramoss writes:
And no, the background radition can not be explained by a number of 'radition objects' That is because the background radation is consistant, not coming from any one source. Radation from specific objects would vary in intensity. (i.e... just like stars to). The 'background' radiation is amazingly even. This would be consistant with a big bang.
Background radiation is figured (so far as I can tell) by subtracting doppler shifts due to Earth's motions and by subtracting out all the radiation from our galaxy. The resulting radiation then is NOT consistent, but lumpy (just not very lumpy). Well, that is not surprising. We are looking, then, at objects outside our galaxy, how strong are we expecting their signals to be?
Also, how well do we subtract out the radiation from our galaxy?
ramoss writes:
The observation that caused people to conclude that the 'big bang' happened is that the objects in the universe are flying away from each other. As we took our observations, and extraploated back , the objects got closer and closer togather. BTW, The concept that is started as a single point came from a priest.. .. funny thing, huh?
What objects do we observe flying away from each other? I was aware that red shift indicates (possibly) that everyting is moving away from the earth. I am currently under the impression that the "flying away from each other" is merely an assumption based on the idea that "the earth is no big deal."
Which objects have been observed flying away from each other?
--Jason
This message has been edited by TheLiteralist, 08-02-2005 07:27 AM