NEUTRINO SAID TO BE FOUND, ONTO DARK MATTER: 3/8: The Elephant in the Universe: Our Hundred-Year Search for Dark Matter by Govert Schilling (Author), Avi Loeb (Foreword)
The John Batchelor Show
John Batchelor
4.5 • 2.8K Ratings
🗓️ 18 May 2024
⏱️ 11 minutes
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Summary
https://www.msn.com/en-us/news/technology/icecube-researchers-detect-a-rare-type-of-energetic-neutrino-sent-from-powerful-astronomical-objects/ar-AA1nIfW2
https://www.msn.com/en-gb/money/technology/something-fishy-is-happening-with-the-milky-ways-dark-matter-halo/ar-BB1hs74y
https://www.amazon.com/Elephant-Universe-Hundred-Year-Search-Matter/dp/0674248996
In The Elephant in the Universe, Govert Schilling explores the fascinating history of the search for dark matter. Evidence for its existence comes from a wealth of astronomical observations. Theories and computer simulations of the evolution of the universe are also suggestive: they can be reconciled with astronomical measurements only if dark matter is a dominant component of nature. Physicists have devised huge, sensitive instruments to search for dark matter, which may be unlike anything else in the cosmos―some unknown elementary particle. Yet so far dark matter has escaped every experiment. Indeed, dark matter is so elusive that some scientists are beginning to suspect there might be something wrong with our theories about gravity or with the current paradigms of cosmology. Schilling interviews both believers and heretics and paints a colorful picture of the history and current status of dark matter research, with astronomers and physicists alike trying to make sense of theory and observation.
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Transcript
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| 0:00.0 | This is CVS, I on the World. I'm John Bachelor with Gober Shilling, his wonderful new book, The Elephant and the |
| 0:10.0 | Universe, 100 year search for dark matter. |
| 0:13.4 | Also, his travels and his conversations |
| 0:16.5 | with astronomers and researchers in deep minds, |
| 0:21.1 | in the beautiful chilly, high desert of Chile, and also back in time, |
| 0:27.0 | Gover is going to take us to the Big Bang and why it is that that's important to make part of the search for dark matter. |
| 0:35.2 | What happened in the first moments? What is it? How can we imagine it covered? |
| 0:40.0 | It's an extremely complicated topic, but we see now that space is expanding because all the galaxies get farther and farther away from each other. |
| 0:48.5 | So the empty space between galaxies is expanding. That's something that we have measured over and over again. So if you try to work that back in time you must realize that in the past everything all the matter in the universe was closer together and if you go back in time |
| 1:05.6 | then it must have started in a very dense state and a very hot state and that's what the storm was called |
| 1:10.9 | the Big Bang which is actually the birth of our current universe. |
| 1:15.0 | Obviously there are many, many riddles about the Big Bang. |
| 1:18.2 | We don't know why it started or how it started. |
| 1:20.8 | We don't know the details, but we are pretty sure it must have happened. But now the problem is that if you start to study the remaining radiation of this hot phase, the cosmic background radiation, this radiation |
| 1:34.0 | radiation tells you something about the situation back then and you see that |
| 1:38.0 | universe must have been extremely smooth back then so maybe a little bit tiny differences in density but in general |
| 1:45.9 | very smooth like a well-stir soup, not much clumps and and concentrations in it. |
| 1:52.1 | But if we look at the universe today, only 14 billion years later, it's very clumpy. We have galaxies, we have clusters, we have big dense concentrations, we have empty voids. So somehow from this smooth beginnings, |
| 2:06.7 | we must have, the universe must have evolved towards the current clumpy universe. |
| 2:12.4 | And the only way that the son members are able to explain that fast clumping |
| 2:16.9 | is by gravity, by much more gravity than the amount of stars and gas that we see can can explain. So again this is a very |
| 2:27.4 | important realization that that the universe must be governed by dark matter. |
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