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New study just made the "crisis in cosmology" WORSE

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Go to https://brilliant.org/drbecky to get a 30-day free trial and the first 200 people will get 20% off their annual subscription! The so called “crisis in cosmology” (or Hubble tension) is the biggest problem in astrophysics right now, with two main methods for calculating the expansion rate of the Universe, which completely disagree with eac†teemh other. This month a new study came out pointing out that the Milky Way is found in the Laniakea supercluster of galaxies, a very dense part of the Universe. This throws off our measurements of the velocities with which galaxies appear to be moving away from us due to the expansion rate of the Universe, and if you take this into account properly, you end up making the “crisis in cosmology” WORSE than before… And yeah, w’re all aware this doesn’t exactly constitute a real crisis. Giani et al. (2023; Laniakea supercluster effect on the Hubble constant) - https://arxiv.org/pdf/2311.00215.pdf Tully et al. (2014; discovery of Laniakea supercluster) - https://arxiv.org/pdf/1409.0880.pdf Yuan et al. (2022; first JWST results on “biased bright” standard candles) - https://arxiv.org/pdf/2209.09101.pdf JWST proposal 1995, Freedman et al. - https://www.stsci.edu/jwst/phase2-public/1995.pdf JWST proposal 1685, Riess et al. - https://www.stsci.edu/jwst/phase2-public/1685.pdf My previous videos on the crisis in cosmology - https://www.youtube.com/playlist?list=PLd19WvC9yqUf5TRqYoMYxEwjT6JIDW4Zn 00:00 - Introduction: what’s the “crisis in cosmology”? 03:10 - What is the Laniakea cluster and why is it important? 05:58 - How much does Laniakea affect the rate of expansion you measure? 09:06 - Caveats on this research 10:34 - Upcoming JWST data that should solve the “crisis” 11:40 - Outro 12:06 - Brilliant 13:23 - Bloopers #crisisincosmology #hubbletension #JWST Video filmed with a Sony Alpha 7 IV --- 📚 My new book, "A Brief History of Black Holes", out NOW in hardback, e-book and audiobook (which I narrated myself!): http://hyperurl.co/DrBecky --- 📚 "The Year In Space" celebrating all things space in 2022 from me and the rest of the Supermassive Podcast team: https://geni.us/jNcrw --- 👕 My new merch, including JWST designs, are available here (with worldwide shipping!): https://dr-becky.teemill.com/ LAST SHIPPING DATES FOR CHRISTMAS: AUSTRALIA & NZ: 30th November 2023 AFRICA & ASIA: 4th December 2023 EU: 8th December 2023 USA & CANADA: 9th December 2023 UK: 18th December 2023 (Priority shipping 20th December 2023) --- 🎧 Royal Astronomical Society Podcast that I co-host: podfollow.com/supermassive --- 🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video! --- 👩🏽‍💻 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. http://drbecky.uk.com https://rebeccasmethurst.co.uk

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