Does the expansion rate of the Universe CHANGE over time?! | DESI 1 year results
130,868
Published 2024-04-25
DESI 1st year public release: www.desi.lbl.gov/2024/04/04/desi-y1-results-april-…
Papers that I showed plots from in this video:
DESI collaboration III (2024): arxiv.org/pdf/2404.03000
DESI collaboration IV (2024): arxiv.org/pdf/2404.03001
DESI collaboration VI (2024): arxiv.org/pdf/2404.03002
00:00 Introduction
02:20 Chapter outline
04:03 What are Baryonic Acoustic Oscillations (BAO)?
06:30 What is a "standard ruler"? And how they allow you to calculate the expansion rate of the Universe
08:04 What the DESI collaboration found
08:46 Do their results agree with our best model of the Universe?
11:26 Bloopers
Video filmed on a Sony ⍺7 IV
Video edited by Jonny Hyman
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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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All Comments (21)
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Trying to explain BAOs to a lay audience in a short video is quite a heroic feat! Well done.
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Becky Announcing Observations!
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Thank you for having the video sponsored by Squarespace rather than Better Help
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I love your videos because you don't sugar coat the data or talk down to your audience . I might not understand the details but the overall point is very clear and very interesting thanks for being a genuine person . keep it up
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I like the advertisement annotation and the progress bar.
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Last time I was this early the expansion of the universe was progressing at a different rate
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Hi Becky, that was by far absolutely the best explanation of BAO that I’ve ever heard on YouTube. Thank you so much. Finally, I understood.
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its neat to get a description of something we haven't already heard a million times, like "black holes are places where nothing can escape - not even light!"
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Love your stuff, Dr Becky! Edit: I can always rely on these videos to clearly breakdown headlines etc into reasonable bits.
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Brings to mind the Monty Python's song: "🎼🎵"The Universe itself keeps on expanding and expanding..."🎶🎵
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You are totally awesome at this.
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Publish, publish, publish! Sounds groovy. TRUST !!
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Thank you for having the video sponsored by Squarespace rather than Better Help!
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Bloopers Becky has so much charm and we adore her! <3 ty for the update Dr Becky!
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The video turned out to be informative, thank you Becky!
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Thank You, Dr. Becky
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You explained that so well!
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Fun filled informative segment!! ❤
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Fascinating, thank you!
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Great video, really clear explanation. Thanks Dr. B.
