Quote:
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Originally Posted by sjastro
The earliest galaxies are red shifted into the infrared spectrum that they are invisible in optical instruments.
Since the universe is permeated with a Cosmic Infrared Background (as opposed to the BB remnant Cosmic Microwave Background), detecting these galaxies with IR telescopes is extremely difficult.
It's analogous to the difficulties of imaging a very faint galaxy in a light polluted sky.
Regards
Steven
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Have had a peek at the article (attached).
I think the author is saying that as the expansion of the cosmos is thought to be accelerating, a point will be reached in the distant future (another 143 billion years) when light from galaxies outside our local group will no longer reach us. Distant galaxies will get to a point beyond redshift ... where the cumulative cosmological expansion between them and us will exceed the speed of light so that new light being emitted from these galaxies can no longer reach us.
As I understand things, their images will not "freeze" (as in a still frame), but would progressively redshift until no new lightwaves/photons can catch us.
Looks like we haven't much time ...we need to band together and convince our spouses/politicians that investments in astronomy equipment need to be
significantly increased, and fast !!!
