Katie MackHave you heard about JWST seeing galaxies that shouldn’t exist? There’s more to that story!
My latest for BBC Science Focus: https://www.sciencefocus.com/comment/james-webb-space-telescope-ancient-galaxies
Nigel Moss 🌻@AstroKatie To be fair, the universe didn't have social media back then. Less time for procrastination, more time for galaxy-building 🙂
BashStKid@nigenet @AstroKatie “Look at that young dust today, lounging with its avocado toast, I’d built a Local Group when I was its age”
Medea Vanamonde🏳️⚧️ ♀@AstroKatie yeah being seeing chatter on that @TruthOrFiction had a debunk on the story that the Jack Webb 🔭had disproved the Big Bang
Nick AppleyardNoting the caveats about the observations, if this does mess up the cosmological age/distance curve then what are the implications?
Is dark energy then trashed, for example?
@nick_appleyard Nah nothing like that. At worst, it would require altering the expansion rate in the early universe somehow
@AstroKatie or maybe it’s a Hubble Bubble?
No idea whether that explains anything, I just enjoyed typing it.
The cat who walks thru walls@nick_appleyard @AstroKatie As I understand it (and of course ICBW), if it does indeed turn out that those galaxies are too massive, that would require a rethinking of our current understanding of how the universe formed ("the first three minutes" and all). Right now, I'd say the only answer could be "no one knows", but reworded as "we need more data" - it would be yet another case in the history of science when the widely accepted theory would be incapable of explaining the empirical evidence, so modifications would be necessary. So, no one knows :)
Thomas Chouvenc / Termite Lab@AstroKatie leading with academic productivity as analogy is.👍😋..
aeva@AstroKatie this stuff is so neat. how do we tell if something is red shifted vs just being red to begin with?
@aeva Good question! Main way is to use patterns of known absorption or emission lines. They’ll get shifted to longer wavelengths but will appear at the same places relative to each other in the spectrum
Roc 
@AstroKatie @aeva Her explanation is pretty good I think https://youtu.be/2VVVADtXNBE?t=1427 (time at 23:47)
SvanteIt fuels a hypothesis that I have been ruminating for a long time: what if the redshift is not a property of spacetime but of the light, i. e. it is losing (dissipating) energy ever so slightly over long distances?
Gomijacogeo
J.S. Pailly@AstroKatie I love that final line. If I were the universe, I'd want to start making galaxies as soon as possible, too.