What do redshift measurements from JWST say about early galaxies?
#1
I was just reading about the new results from the James Webb Space Telescope regarding early galaxy formation, and the reported data on redshift measurements is honestly making my head spin. How can these observed structures be so massive and mature so soon after the Big Bang? It seems to directly challenge the timeline we've been working with.
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#2
I hear you. The JWST results feel jarring at first. Then you pause and think about the data this stuff is new and noisy. Some galaxies look huge but maybe the images are boosted by lensing or dust. I tried comparing with older surveys and the gaps stood out.
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#3
The redshift numbers are stubborn and a little unnerving. They push the apparent ages earlier than the old timeline allows. A few lines could be misidentified. Gravitational lensing could exaggerate sizes and masses. So the story may be less dramatic than it first seems.
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#4
I did a rough back of the envelope calculation and it did not clear things up. Small changes in star formation efficiency could swing the results a lot. I kept thinking about what we actually measure and what it means for ages. The exercise felt inconclusive but I did it anyway.
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#5
Sometimes I drift to how the telescope is built and how detectors behave during calibration. The drift in background light and tiny warm up steps can tilt the numbers a bit. It makes me wonder if the timeline is honest or if our instruments are playing tricks Could it be that the real problem is our instruments rather than the early universe?
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