Posted on 08/08/2022 8:55:50 AM PDT by Red Badger
Ping!....................
I know it’s probably something I would not understand, but when Scientists say in an article, they are peering back into the origins of the Universe with the JWST, I wonder what happens in 20 or more years when another telescope is out there which is 100 times more powerful than the JWST and can see even further back in time, meaning how does anyone know when the end of the universe has been reached.
At some point, the red-shift of the light will be so far under the ‘infra-red’ (read: heat), part of the spectrum that it will be undetectable. Then you will have reached the edge of the known Universe. There may very well be ‘stuff’ out there beyond that physical limit, but we won’t ever see it in this lifetime................................
Only if you are running towards me!........................
If you believe in the Big Bang, and the estimates of when the Big Bang occurred (based on red shift observations) then you wouldn’t be able to look back more than about 15 or 16 billion years.
Once JWST became operational, there is no longer any mention of light shift/bending from gravitational waves.
Big Bang! Schrodinger’s Cat?
When you finally see God
I get that part, but suppose the current level of understanding red-shift is not fully known, perhaps based on information from the JWST causes a change in that understanding.
Back when Neil Armstrong walked on the moon, who would have thought the JWST would exist.
OK... so the galaxy’s spectra are what you’d expect from a galaxy that’s way beyond the farthest known galaxy... but the spectra could also be skewed by fact that it’s simply spinning away from us extra-fast because it’s spinning around a parent galaxy? Couldn’t add THAT much extra speed? And what does a huge number of newborn stars have to do with redshift?
In this instance, there may be two objects, one in front of the other, of similar shape and size in the JWST field of view, so that their light may interact. One being much closer than the other, but both being red shifted by a large amount................Just a guess....................
How do I know it’s not just a picture of a salami slice?
Before a star has accreted enough mass to ignite its nuclear fire, I assume that it gives off a huge amount of infra-red radiation as it gets hotter and hotter..................
Because it’s not hiding the salami.................
You can only look back to when light first appeared in the universe, which appears to be 13.? billion years ago. Nothing to look at before that no matter how powerful the telescope.
I get that, suppose at some point it’s discovered that those assumptions are wrong.
I believe there is no end to discovery and knowledge and what our understanding is now might not the same at some point in the future.
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