AD - Go to https://ground.news/drbecky to stay fully informed on Space and Science News. Subscribe through my link to get 40% off the Vantage plan for unlimited access this month only | Last weekend the lead researcher of a group using data from the James Webb Space Telescope (JWST) to calculate the current rate of expansion of the Universe (aka the Hubble constant, H0) presented their results for the first time at an American Physical Society meeting. What they announced was not at all what everyone was expecting... DISCLAIMER: None of this work is published yet. It has not been peer reviewed. Take everything with a large pinch of scientific salt.

My previous videos on the "crisis in cosmology" -    • The Crisis in Cosmology  
My video from earlier this year on the JWST result showing that overcrowding wasn't the problem -    • JWST rules out MOST LIKELY culprit fo...  

APS meeting schedule with Wendy Freedman’s talk - https://meetings.aps.org/Meeting/APR2...
Hu & Wang (2023; list of new physics hypothesis beyond best model of the universe) - https://arxiv.org/pdf/2302.05709.pdf
Riess et al. (2024; hubble tension not due to crowding problem) - https://arxiv.org/pdf/2401.04773.pdf
DESI collaboration (2024; H(z) and H0 measurements) - https://arxiv.org/pdf/2404.03002.pdf
Lee et al. (2023; JAGB stars as standard candles) - https://arxiv.org/pdf/2305.02453.pdf
Bellazzini et al. (2004; TRBG stars as standard candles) - https://arxiv.org/pdf/astro-ph/040457...
Planck collaboration (2018; latest best model of the Universe parameters) - https://arxiv.org/pdf/1807.06209.pdf
Royal Society meeting with Wendy Freedman talk - https://royalsociety.org/science-even...

00:00 Introduction
03:17 AD Ground News
04:54 What is the Hubble Tension (aka the "crisis in cosmology")?
07:40 The possible explanations/solutions for the Hubble tension?
14:22 What Freedman et al. are claiming to have found with JWST
18:32 How does this compare to previous work on this with JWST?
20:30 What now? Is the “crisis in cosmology” really over?
22:57 Bloopers

Video filmed on a Sony ⍺7 IV

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👩🏽‍💻 I'm Dr. Becky Smethurst, an astrophysicist at the University of Oxford (Christ Church). I love making videos about science with an unnatural level of enthusiasm. I like to focus on how we know things, not just what we know. And especially, the things we still don't know. If you've ever wondered about something in space and couldn't find an answer online - you can ask me! My day job is to do research into how supermassive black holes can affect the galaxies that they live in. In particular, I look at whether the energy output from the disk of material orbiting around a growing supermassive black hole can stop a galaxy from forming stars.


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https://rebeccasmethurst.co.uk