Quizzes & Puzzles1 min ago
Visible Universe
They say there is a limit to our visible universe but why is it that we cannot see any further?
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For more on marking an answer as the "Best Answer", please visit our FAQ.. . . or as they say o'er yonder, "deh tird eye". Somehow I think they've spotted it closer to the truth.
Re; the visible universe. As an object recedes at a velocity approaching the speed of light, the intensity of its light weakens as the wavelength stretches further towards the infrared and ultimately fades to black.
Re; the visible universe. As an object recedes at a velocity approaching the speed of light, the intensity of its light weakens as the wavelength stretches further towards the infrared and ultimately fades to black.
The visible edge is not limited by the power of the observing equipment but because the distance expanded. This theory is a model that is consistent with the observations.
The Cosmic Microwave Background is what we see of the flash that accompanied the Big Bang. However it wasn't at microwave frequencies when it was emitted but much higher frequency gamma radiation.
As it travelled through the expanding space its frequency was red shifted down to microwaves.
The Cosmic Microwave Background is what we see of the flash that accompanied the Big Bang. However it wasn't at microwave frequencies when it was emitted but much higher frequency gamma radiation.
As it travelled through the expanding space its frequency was red shifted down to microwaves.
At present the edge of the visible universe is determined by the equipment, it doesn't get close to the theoretical limit. I am slightly puzzled by the presence of the microwave background radiation, why didn't it all just radiatate away to beyond the edge of the visible universe about 14 billion years ago.
Thank you mibn2cweus
Would your answer imply that the light from furthest galaxies that we can see is extremely red shifted, and is this the case?
Can you answer a question I have asked previously?
As the things out there are traveling away from us, is anybody watching for them disappearing from our view?
Would your answer imply that the light from furthest galaxies that we can see is extremely red shifted, and is this the case?
Can you answer a question I have asked previously?
As the things out there are traveling away from us, is anybody watching for them disappearing from our view?
Rather than 'disappearing' perhaps a slow gradual fading into invisibility might be a more appropriate description, somewhat visually analogous to a torch depleting the last of the batteries charge.
Here are some links I've found to material possibly relevant to your question - http://www.atlasofthe...rse.com/redshift.html
a link to the above also appears here - http://cs.astronomy.c...s/forums/t/40883.aspx
Here are some links I've found to material possibly relevant to your question - http://www.atlasofthe...rse.com/redshift.html
a link to the above also appears here - http://cs.astronomy.c...s/forums/t/40883.aspx
fascinating - http://mimg.ugo.com/2...spock-fascinating.jpg