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Bahram Mobasher of the Space Telescope Science Institute, leader of the science team, explains, "We found this galaxy in Hubble's infrared images of the UDF and expected it to be young and small, like other known galaxies at similar distances. Instead, we found evidence that it is remarkably mature and much more massive. This is the surprising discovery."
"If the distance measurement to this object holds up to further scrutiny, the fact such a galaxy has already completed its star formation implies a yet earlier period of intense activity," Ellis adds.
Originally posted by Arbitrageur
...Which raises a question about the accuracy of the distance measurement.
The very high energy/matter densities of the very early universe meant that star, and galaxy formation proceeded at a much greater rate in the begginging of the universe.
All the matter and energy was present at the birth, not created as time went by.
At one point in the very early universe(ABOUT 300K YEARS AFTER tbb) the mater/energy density was so high that it put the universe under a photonic pressure of round 14psi.
thats so much light it exerted 14 pounds of pressure per square inch.
Originally posted by trace_the_truth
"Dimmer" is not a scientific term. You are no scientist, that much is clear. Photons do not lose energy as they travel. Further objects appear dimmer because photons are dispersed. If the universe were infinite with infinite stars then dispersion would not even come into play for practicalities sake because the spectrum of dispersion would result into the infinite concentration of photons in any particular area.
Originally posted by trace_the_truth
I'm sorry. You are going to have to present me with someone more worthwhile in your next post to have me take you seriously. As of now, I am viewing you as a joke.
Originally posted by Devino
So what about the word 'Space"?
Is space an absolute void that is empty and completely absent of anything and everything, or is it a measurable medium existing between mass?
Space as a medium would have energy like heat and light being full of EM waves, ions, various micro (and macro) particles both atomic and subatomic all of which can be measured.
Space as a void is the vary definition of "that which does not exist", no matter how many times we try the equation, 0+0=0, it's always the same. Either way "space" does not and can not expand, it's the distance between two objects that expands.
While it remains the staple of virtually all cosmological teaching, the concept of expanding space in explaining the increasing separation of galaxies has recently come under fire as a dangerous idea whose application leads to the development of confusion and the establishment of misconceptions. In this paper, we develop a notion of expanding space that is completely valid as a framework for the description of the evolution of the universe and whose application allows an intuitive understanding of the influence of universal expansion. We also demonstrate how arguments against the concept in general have failed thus far, as they imbue expanding space with physical properties not consistent with the expectations of general relativity.
Much has been written in the debate about whether the space between galaxies is "really" expanding, or whether on the other hand the motion of galaxies is a kinematic recessional motion through space. The equivalence principle strongly suggests that it is impossible to detect any observational difference between the two models, indicating that we have no reasonable alternative but to treat both as being equally valid and mathematically interchangeable.
I'll conclude by noting that while the equivalence principle suggests that 'expanding space' and 'kinetic recession' are merely different descriptions of the same thing, that doesn't mean we have sorted out all of the complexities. In particular, no complete and demonstrably valid explanation has been provided as to how the cosmological redshift and the Superluminal recession of distant galaxies can be explained by a purely kinetic model. However, the equivalence principle encourages optimism that eventually the kinematic model will be fleshed out enough to provide a fully kinematic alternative explanation of those phenomena. On the other hand, we may eventually conclude that a fully kinematic explanation would result in measurable observational differences. That remains a real possibility, despite the faith we put in the equivalence principle. In which case, we will eventually be able to know for a fact whether 'expanding space' causes particles to separate, or whether the particles are moving kinematically through space.
But it's interesting to see this very question is being debated in the physics community, and even being called "the root of all evil"
Originally posted by Devino
What I do know is that the redshift of light is not proof of an expanding Universe.
But it's interesting to see this very question is being debated in the physics community, and even being called "the root of all evil"
I laughed when I read this part because I finally got the punch line. The religious connection that was in the title, "Expanding Space: the Root of all Evil?", to the idea that cosmology is becoming a religion. I enjoyed that one almost as much as this discussion.
Originally posted by Arbitrageur
just because a distant galaxy has a blueshift instead of a redshift doesn't invalidate the redshift theory
Originally posted by Arbitrageur
Maybe the universe isn't expanding, but if that's the case then better proof is needed
Originally posted by Arbitrageur
You liked that too eh? I often think that belief in inflation, dark matter and dark energy are sort of a religion."
Originally posted by Devino
Originally posted by Arbitrageur
just because a distant galaxy has a blueshift instead of a redshift doesn't invalidate the redshift theory
I think the proof against 'H' as a constant is found in the redshift of Quasars and the apparent luminosity that is in bold contradiction to Hubble's law.
CONCLUSIONS:
At any given epoch, quasars' intrinsic Luminosities vary over roughly three orders-of-magnitude. And, quasars appear to brighten from z=3 to z=2, before steadily dimming, by about three orders-of-magnitude, from z=2 to z=0.03, after which quasars have faded from view.
Quasar numbers also follow a similar evolution, rapidly increasing in comoving density, before fading from view:
[atsimg]http://files.abovetopsecret.com/images/member/5c218f6efda8.jpg[/atsimg]
Originally posted by sirnex
I understand the current explanation is chance alignment, but to such a degree that a bridge/jet exudes from the galaxy for no apparent reason in just the right direction that it looks like it's connected to something billions of light years away?