Geraint F. Lewis

Dear teachers of special relativity - please stop telling students that special relativity can't handle acceleration and they have to wait for general relativity for that. ThX

Being the 80th anniversary of the bombing of #Hiroshima, this image is doing the rounds as a flash shadow of a person. However, I suspect this is not what this is, as it is much more distinct than other shadows and doesn't appear to have a history before 10-15 yrs ago. Anyone have details?

And, of course, there was an astronomer royal of Ireland until 1922.

Afaik there has been no new appointment or discussion about the position 😕

Southern Highlands Branch Meeting: 2025-9 - The Royal Society of NSW “Peering at the Sky with Nature’s Telescopes”   Professor Geraint Lewis FRSN FLSW Sydney Institute  of Astronomy School of Physics University of Sydney Date: Thursday, 16 October, 6.30–7.30 pm AEST […...

I'm going to be talking at the Southern Highlands Branch of the Royal Society of New South Wales on the 16th October in Mittagong (a wonderful part of Australia). If you want to hear about gravitational lenses, come along.

www.royalsoc.org.au/events/south...

It would be a good thing, but with me living 20,000 km away in New South Wales, it should probably come from Cardiff!

*grumble grumble* No Astronomer Royal for Wales *grumble grumble*

You don't listen to sound, your inner ear feels it!

Did anyone get the memo that we should be rethinking the origins of the universe? I seem to have missed it.

A little Saturday afternoon culture at the Parramatta Riverside Theatre - and excellent play!

Wait until you bump into the Sulphur Crested Cockatoos and Bin Chickens!

*England* has King Arthur? Are you sure about that?

I do hope you get a physicist on your pod to explain how the bomb works, rather than just saying "science - too complicated".

The towns in Wales where Churchill was loathed Many in Tonypandy and Llanelli saw Churchill as someone who would use troops against workers

Loving the Yalta episode in @empirepoduk.bsky.social but I have to take issue at your claim of the British love of Churchill. Where I grew up - the Welsh Valleys - he is not a popular figure and is still spoken about negatively (& often with swear words).

www.walesonline.co.uk/news/politic...

46 years apart - always part of my Cambridge pilgrimage.

Not everyday you get to see the original model of DNA!

Not a huge amount - some bits are similar, but the overarching theme is much broader, including some chemistry, biology and even some philosophy (gulp)!

Back in my homeland

YouTube video by Cool Worlds Podcast #23 Geraint Lewis - Fine-Tuning, Multiverse, Cosmological Tensions

Want to hear me talk about lots of different aspects of cosmology, fine-tuning and the multiverse? This video is for you.

youtu.be/OejwZqh-F9U?...

It means people don't understand the difference between a phase and group velocity of a wave.

... or physics and astronomy

Talk at CosmoVerse in Istanbul done! #cosmology

Picture of a large group of Australian radio astronomers on the stage at the SKAO 2025 meeting.

Incredible showing from Australians past, present and future, at #SKAO2025 in Görlitz.

All very excited about getting the first data from the SKAO telescopes!

Aussie, Aussie, Aussie!

#RadioAstronomy

Street art in Goelitz

A picture of 11 people from our Sydney radio astronomy team behind giant letters that spell SKAO. The letters are blue/purple/bright pink.

Sydney radio astronomers (plus a bonus cosmologist) at SKAO 2025!

It's great to be here with so many of our team :)

@manishacaleb.bsky.social @astrolaura.com @cosmichorizons.bsky.social

@ozgrav.bsky.social #RadioAstronomy #SKAO2025

I decided to stay in Poland. Nice and quiet there.

Space street art in Strasbourg

"Existential panic" - no one told me I should be panicking!

Where’s the proof in science? There is none UNDERSTANDING RESEARCH: What do we actually mean by research and how does it help inform our understanding of things? Those people looking for proof to come from any research in science will be sadly ...

At the Multiverse From Home conference, I had a bit of a rant about how science is not about “falsification” (other than in trivial examples) and remembered I wrote about how it had nothing to do with proof either a decade ago.

theconversation.com/wheres-the-p...

I am the son of a coal miner who went underground with him as a teenager in the 1980s (both NCB and private pits). He told me he never wanted me or my brother to go into the mines. But there was nothing else then, so here I am, living as a cosmologist in Australia. Am happy I didn't.