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A Cosmic Miracle: A Remarkably Luminous Galaxy at z=14.44 Confirmed with JWST

59 pointsby yreadtoday at 8:43 AM26 commentsview on HN

Comments

abainbridgetoday at 1:18 PM

We're seeing this galaxy as it was 280 million years after the Big Bang. But the universe didn't become transparent to photons until 100 million years after that (https://en.wikipedia.org/wiki/Recombination_(cosmology)). So that's impossible. Who's wrong, Recombination theory or this paper?

Or have I missed something?

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reactordevtoday at 2:03 PM

The big bang time relativity problem sometimes makes your brain hurt but this is amazing!

I’m so fascinated by the fact that we can look back through time by looking at these distant objects. I wish I went into astrophysics instead of engineering…

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dguesttoday at 11:52 AM

arXiv link: https://arxiv.org/abs/2505.11263v2

Note: I like arXiv links anyway, but in this case something about the page was killing my browser, had to reload a few times.

eitau_1today at 12:01 PM

Does anyone know if JWST has seen stuff far enough for this effect to kick in?

[Angular Diameter Turnaround](https://xkcd.com/2622/)

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rwmjtoday at 1:26 PM

That's the most authors I've seen on any paper. I counted 46 across 36 separate institutions.

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nasretdinovtoday at 9:37 AM

Why did we make just an infrared telescope then? Why don't go into even lower frequencies, surely we would detect something too if we just look?

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317070today at 10:25 AM

I love the finding, but I really like the first sentence on their abstract: "JWST has revealed a stunning population of bright galaxies at surprisingly early epochs, z>10, where few such sources were expected."

Unless stunning has a technical meaning I'm unaware of, I like this approach of starting a technical paper with something less dry.

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evolextratoday at 12:20 PM

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