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Took out the bike on a sunny afternoon. Only took 15 minutes for a bald man in his Vauxhall Corsa to start shouting at me and remind me I'm back in the UK

UK astronomers (Rebecca Bowler) spotted on TV coverage of yesterday's Tour de France stage 😎

Read the latest from Luiz Paulo Souza, celebrating the first two years of ESA Webb Telescope that has brought us 'a nova revolução': veja.abril.com.br/ciencia/um-sal…

Incredible series of opening ceremonies to welcome participants to a historical #IAUGA2024, held on the African continent for the first time 🤩🇿🇦

We confirmed the tiny green blob below to be a galaxy so distant it is seen when the Universe was only 2% of its current age, and… its spectrum came out as a huge surprise! 📈🔭 Read more in the excellent summary by Kevin Hainline who first discovered this galaxy 👇

JWST finds distant galaxy with “impossible” light signature JWST didn't "break" the Universe. But one early galaxy, JADES-GS-z13-1-LA, has a Lyman-α emission line more than 200 million years earlier than anything else. bigthink.com/starts-with-a-… cc:Kevin Hainline Joris Witstok

So, JADES-GS-z14-0, has been shown (by two independent teams looking at the same data from ALMA) to be at z = 14.18! The galaxy has been confirmed to have both carbon AND oxygen emission, only 294 million years after the Big Bang.

Happy birthday to Niels Bohr! 🥳 As per tradition, today was the institute's annual picture day. A tour of his office served as a reminder how much of (astro)physics derives from quantum theory he pioneered – together with many seeking refuge from authoritarians in Denmark...

Proud supervisor day! New to the arXiv arxiv.org/pdf/2410.18193 - remember those cool galaxies in the first JWST data releases that showed us [OIII]4363?! - One of them revealed a high ionisation potential line (work by Jarle Brinchmann) an early indication of all the BHs! (1/n)

It's paper day! Very excited to share that my latest paper, and the first to come from my PhD, is on arXiv.org today: arxiv.org/abs/2502.21119

🆕 Webb has seen an unexpected ‘first light’ 🌟 in one of the most distant galaxies yet discovered: JADES-GS-z13-1 Read more: esawebb.org/news/weic2505/ or 🧵👇

Earliest sign of the Universe becoming transparent discovered with ESA Webb Telescope. Joris Witstok et al. detect the escape of your favorite UV light, Lyman α, the signature of an ionized bubble, only 330M years after the Big Bang. 🇬🇧cosmicdawn.dk/news/james-web… 🇩🇰 cosmicdawn.dk/news-in-danish…

Nature research paper: Witnessing the onset of reionization through Lyman-α emission at redshift 13 go.nature.com/3FJFEsn

The universe also has eras! Webb spotted a surprising galaxy from just 330 million years after the big bang, during the universe’s “era of reionization.” It shouldn’t have been detectable because of the composition of the early universe, but it was! How? go.nasa.gov/4iGBWyg

It was a pleasure to come onto The The Naked Scientists podcast to chat about the earliest galaxies!

A wonderful summary of our results on the enigmatic galaxy GS-z13-1 came out in Physics Today a few days ago! pubs.aip.org/physicstoday/o…