A possibility the universe may not be expanding after all.

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    Jul 17, 2013 5:32 PM GMT
    http://www.huffingtonpost.com/2013/07/17/universe-expanding-cosmologist_n_3606136.htmlIn the 1920s, astronomers including Georges Lemaître and Edwin Hubble found that most galaxies exhibit such a redshift — and that the redshift was greater for more distant galaxies. From these observations, they deduced that the Universe must be expanding.

    But, as Wetterich points out, the characteristic light emitted by atoms is also governed by the masses of the atoms' elementary particles, and in particular of their electrons. If an atom were to grow in mass, the photons it emits would become more energetic. Because higher energies correspond to higher frequencies, the emission and absorption frequencies would move towards the blue part of the spectrum. Conversely, if the particles were to become lighter, the frequencies would become redshifted.

    Because the speed of light is finite, when we look at distant galaxies we are looking backwards in time — seeing them as they would have been when they emitted the light that we observe. If all masses were once lower, and had been constantly increasing, the colours of old galaxies would look redshifted in comparison to current frequencies, and the amount of redshift would be proportionate to their distances from Earth. Thus, the redshift would make galaxies seem to be receding even if they were not.


    Here's a link to the original research paper. I often like to read them to understand theories and experiments in greater details.

    http://arxiv.org/pdf/1303.6878v2.pdf
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    Jul 17, 2013 6:12 PM GMT
    Now my head hurts, and I didn't even click on those links. icon_confused.gif
  • HottJoe

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    Jul 17, 2013 8:43 PM GMT
    Even the universe has to watch its waistline.
  • AMoonHawk

    Posts: 11406

    Jul 17, 2013 9:43 PM GMT
    From where we see it in our life time ... it may as well just be standing still
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    Jul 24, 2013 5:16 AM GMT
    My theory behind the universe is that there is a finite mass to the universe. We know that matter cannot be created or distroyed, thus there is a finite amount of matter which would support my hypothesis of a finite mass. If the universe is seen to go on forever then how can there be this finite number of stuff in it. If you think of the universe as spherical, of which the radius is unknown and the center is unknown, then the universe can be expanding and coming together at the same time depending upon which perspective you choose to look at it from. But in this thinking you also have to take into consideration large massive bodies that are in this space that can warp the space around it such as black holes. With this warp in space there is a warp in time as well given that time is relative to the space it is in and thus the universe can seem to be even larger than it is presumed to be. With all of this taken into thought, a point from where the universe started could exist and a point to where the universe is headed could exist as well on the complete opposite side of this imaginary sphere that is the universe... however these are just my thoughts on the subject.
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    Jul 24, 2013 5:43 AM GMT
    I thought the recent confirmation of dark energy confirmed that not only is the universe expanding but its expansion is accelerating?
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    Jul 24, 2013 5:46 AM GMT
    The universe is your mind. If your brain(supposedly through which you perceive) is at the smallest level(I'm talking quantum) made of the same "stuff"(energy) as a table or piece of concrete, than obviously it can not be through which you perceive, as it is part of what is being perceived. Therefor there must be something outside of all that is being perceived which observes and interacts. Some call it your subconscious mind, others call it your soul. Whatever the label, that is what truly perceives, interprets, and interacts with the massive flux of data that we call reality. Also time is merely a filter through which we experience existence. There for it's not a question about the universe that we should be asking, but rather what is this observer outside of it all. If anyone can prove this to be different or even just offer a theory or point out any flaws, I'd love to here them as I love thinking about this stuff...