How the Edge of Our Galaxy Defies Known Physics
2,160,852
Published 2019-12-06
Dianna Cowern from Physics Girl visited CERN and spoke to theoretical physicists about Dark Matter.
Why this stuff costs $2700 Trillion per gram: • Why This Stuff Costs $2700 Trillion P... (Antimatter at CERN)
Creator and Writer - Dianna Cowern
Research - Sophia Chen, Imogen Ashford
Editor/Videography - Levi Butner
Thanks: CERN, Dorota Grabowska, Loic Bommersbach, Sarah Charley, Daniella Bardalez Gagliuffi, Heather Dewis
Special thanks to our Sally Ride patrons: Alejandro Gutierrez, Brian O'Connell, Darkbit, Dave Butler, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, and Rishi Dixit.
Join the Physics Girl Patreon community! ►► www.patreon.com/physicsgirl
Sources:
Galactic rotation curves:
arxiv.org/abs/astro-ph/9909252
Searching for Dark Matter with ATLAS (at CERN)
atlas.cern/updates/atlas-feature/dark-matter
The Day the World Didn’t End (NASA)
science.nasa.gov/science-news/science-at-nasa/2008…
Vera Rubin
www.annualreviews.org/doi/full/10.1146/annurev-ast…
MOND Papers
adsabs.harvard.edu/full/1983ApJ...270..365M
arxiv.org/pdf/gr-qc/0506021.pdf
arxiv.org/pdf/gr-qc/0703060.pdf
All Comments (21)
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Anyone who has dropped a guitar pick knows about searching forever to find something you know is there.
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Teacher: "Why is your score so low?" Me: "You only seeing 5%."
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I love stuff like this. I wasn't the only kid in the 60's to ask the geography teacher why the continents looked like a jigsaw puzzle. I wasn't the only student in physics to ask how come there are spiral galaxies when the solar system is not spiral at all. Even in my degree, they insisted that proteins denatured at high temps when you can clearly see the green slime in Iceland and Yellow Stone. Love listening to these young minds, this lady and Diane, their eyes are wide open to anything.
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That was a solid video!. I'm familiar with the content, but still found your descriptions and information to be a big value added!
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I like that she used Siri to confirm her answer, not to give her the answer.
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“we have narrowed down the mass to 90 orders of magnitude. It’s between a neutrino and the mass of the observable universe” So you’ve basically nailed it
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Great video, Dianna presented in a way that we can follow and understand the subject.
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I wonder if faster 'time' rather than faster speeds could be anything to do with what you are seeing if the universe appears to be spinning faster than it's calculated mass appears to be, so you don't really need any more matter to explain the speeds you think you are observing. It's a calculation taking into account the affects of mass and gravity on time that you need.
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They only ask "what is dark matter", they never ask "how is dark matter' :(
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My last job interview I was asked, "What's your education background. I said "I was working toward my PhD in physics but I didn't quite complete it". Interviewer said, "Nice, how far did you get?" Me: "About the 10th grade."
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Thanks for the explanation. It really helped my understanding. However, the one question no one seems to address is how we know that the galaxies are spinning faster than they should be? How do we measure the speed of rotation of a galaxy? How do we measure their total mass and the mass of the inner and outer stars? What is the difference? What is the variation of results when multiple galaxies are compared?
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Just found this channel, and absolute love it. It’s what I have been searching for, for aeons. Thank you for the great videos.
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So you're saying we're completely in the Dark, literally and figuratively.
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I'd just like to point out that Dork Energy would make a good name for a band of physics researchers.
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In the mythos of the original Star Wars continuity, there is a bubble that surrounds the Star Wars galaxy, this bubble is known as the circumferential hyperspace barrier and prevents travel outside of the galactic boundary.
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I first learned about this when I was 14, and I was excited that something hadn't been discovered yet and I would get to eventually learn what it was. I'm 41 now, and still waiting.
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At age 32, bog down by the responsibility and demands of society I kinda forgotten how it felt to be amazed by science. i remember as a kid how science was a lens to look at the beauty of the world. And that feeling is amazing. Science doesn't care about my emotions but I like to be sentimental and be inspired about it. Without the child like wonder of "Eureka" where is the motivation to go search for more knowledge? So thank you for doing this.
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NASA ANNOUNCEMENT "We know this sounds weird, but dark matter turns out to be mostly birds... and cake batter."
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amazing it's like finding "the edge of true love feeling we experience" (a flash back of my study in astronomy 1979-1981 in Bosscha Observatory)
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The picture of the galaxy you posted on this show, is neat! I like M-33; i think galaxies are so cool. They resemble whirlpools, tornadoes, and hurricanes, i think there's a strong relevance there.
