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As with a normal glass lens the alignment is crucial, requiring the position of the lens -- in this case a galaxy -- to be just right. This is very rare and astronomers have to rely on chance alignments, often involving sifting through large amounts of data from telescopes. Most methods of searching for gravitational lenses have a very poor success rate with fewer than one in 10 candidates typically being found to be real.
Herschel looks at far-infrared light, which is emitted not by stars, but by the gas and dust from which they form. Its panoramic imaging cameras have allowed astronomers to find examples of these lenses by scanning large areas of the sky in far-infrared and sub-millimetre light.
Dr Mattia Negrello, of the Open University and lead researcher of the study, said: "Our survey of the sky looks for sources of sub-millimetre light. The big breakthrough is that we have discovered that many of the brightest sources are being magnified by lenses, which means that we no longer have to rely on the rather inefficient methods of finding lenses which are used at visible and radio wavelengths."
Originally posted by Griffo515
The best visual representation of our 'known' universe to date....enjoy!
Originally posted by mr10k
Overall the OP is right. We are literally living in the Past.
Originally posted by muzzleflash
I think logic shows their theory is still fundamentally flawed.
So if it took 45 billion ly to get here, that makes the Universe 90 billion ly across?
This puts us smack dab in the middle of the Universe. It's entirely illogical at it's core.
What is more logical, is that our Devices will continue to see further and further as we develop more sophisticated sensory technology.
This could potentially go on indefinitely. That is unknown, and may never be known for sure.
Not to mention that Big Bang is thrown around as though it is the Truth. Remember, it is still just a theory; one that was initiated by a Vatican Priest (worked well with the idea of creationism), deposed by Hoyle and loved by the modern day physics folk.
Originally posted by Cuervo
- If space-time were infinite, then there would be an infinite number of parallel universes.
Originally posted by CLPrime
reply to post by smurfy
A metric expansion is an expansion where every point in space is being stretched. This differs from the layman view of the Big Bang, where stuff explodes...our universe did not explode, it expanded (specifically, it inflated...theoretically). And there are reasons why this is the case, but the main one is the remarkable uniformity of the universe at the largest scales. In every direction, once you reach the size of galaxy superclusters, the large-scale structure of the universe becomes one of filaments and voids, and these filament-void systems are identical no matter where you look. In contrast, an explosion would spread things chaotically throughout the universe, leaving things much less than uniform on the grand-scale and, in fact, making it much less likely than so many stable star systems could form. In an exploded universe, things get clumped with no grand uniformity - in an expanded universe, things get evenly spread out.
This uniformity is actually SO great that expansion, itself, isn't even enough to explain it. What's needed for that is a time of really, really, really, really, really, really fast expansion... called inflation.edit on 2-2-2011 by CLPrime because: (no reason given)