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Post ApPbgAUNXJ2P9zFuds by [email protected] |
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More posts by [email protected] |
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Post #ApNUGj69vqkkLqyQYS by [email protected] |
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Today the Parker Solar Probe will get 7 times closer to the Sun than anything s… |
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Post #ApNWjpORo3MWBIX3se by [email protected] |
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@johncarlosbaez " ... how cool is it" 😀 waiting for that |
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Post #ApNXmsnjgyvdZcNhia by [email protected] |
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The realm where ions vibrate in the Sun's magnetic fields is a strange one,… |
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Post #ApNZRZ1gDieG4LrjH6 by [email protected] |
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@johncarlosbaez Fascinating.The Parker Solar Probe team indicated that the prob… |
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Post #ApNaUi96rxUjB1PC6q by [email protected] |
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@johncarlosbaez It sounds like the word "surface" is being used in al… |
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Post #ApNcmInM3tQ9fnkHWy by [email protected] |
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@MichaelPorter wrote: "It sounds like the word "surface" is bein… |
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Post #ApNjZKLFhPTuNvMQs4 by [email protected] |
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@johncarlosbaez could we call it an Alfven wave surfer? |
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Post #ApNkHTUn1iO7W5sCEC by [email protected] |
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@johncarlosbaez I think that a hot gas stripped of its ions is a plasma. If I r… |
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Post #ApNkb78Dsw3DwogN9c by [email protected] |
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@johncarlosbaez Me: Hey! The evenings are getting longer!Parker Solar Probe: So… |
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Post #ApNlJFq6s2q7hEG3Pc by [email protected] |
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@johncarlosbaez > the more we study it, the more complex it sends to getSo s… |
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Post #ApNnS2Vtz9a0sh7fRQ by [email protected] |
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@johncarlosbaez how does the probe withstand the heat and radiation in terms of… |
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Post #ApNnwQIa7KMfKxNdFA by [email protected] |
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@johncarlosbaez So, 200 kps?That's impressive, and the solar 'surface&#… |
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Post #ApNrlvehaoOdDfyiZ6 by [email protected] |
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@AkaSci - great stuff! And today I just happen to have learned what a "ps… |
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Post #ApNrwLvil9qrbWuQmO by [email protected] |
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@johncarlosbaez Never noticed that before, but I’m going to look for it from … |
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Post #ApNsCfCKtCrPzpSTXU by [email protected] |
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@MondayMarionJ - it's a strange and wonderful place! |
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Post #ApNtDBBI4p4l90mN28 by [email protected] |
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@johncarlosbaez wait! so there are two types of sound down there?the waves in … |
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Post #ApNuBquM4AqLvtmxvs by [email protected] |
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@johncarlosbaez @MichaelPorter I don't understand the significance of "… |
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Post #ApNv9lF0GU9bjS0tkW by [email protected] |
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@botvolution - I explained "supersonic" in a lot of detail, so I'… |
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Post #ApNw9hoZ6WGF3kBWIy by [email protected] |
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@johncarlosbaez Alfvén himself was a brilliant and unorthodox scientist, unapp… |
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Post #ApNwP61fMxagUdeSAq by [email protected] |
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@johncarlosbaez I read that but obviously didn't understand hence the quest… |
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Post #ApNxtPxJw1DOwjdo5g by [email protected] |
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@lyda I'm noticing the evenings are getting shorter around here, but perhap… |
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Post #ApNyimjd0BjYMajLRA by [email protected] |
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@karora I just noted that on the work WhatsApp group. A whole five minutes! |
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Post #ApNzcUj19JYGiv0d1M by [email protected] |
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@johncarlosbaez Noob question:If the Alfven waves are electromagnetic interacti… |
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Post #ApNzo8piMvuOIlhAhM by [email protected] |
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@johncarlosbaez Just read the Wikipedia article about Alfvén.https://en.wikipe… |
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Post #ApO1mPdn6hrtl7QC7U by [email protected] |
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@johncarlosbaez It is cool and it’s science, reality. The media would rather … |
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Post #ApO3nWnECVUU8gUlGq by [email protected] |
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@botvolution - In the atmosphere of the Sun, what I was calling 'sound'… |
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Post #ApO4WJFZOpc1AT6aqu by [email protected] |
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@bouriquet - A lot of the public could understand more of what's going on h… |
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Post #ApO4sDLY1tIHEGLXhw by [email protected] |
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@FrohlichMarcel - Alfvén got a bit carried away, and some people have gone fur… |
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Post #ApO5VJkABBHYMYVQbw by [email protected] |
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@wolf480pl - Alfvén waves are not completely distinct from electromagnetic wav… |
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Post #ApO6KSeonW9wmFOR1c by [email protected] |
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@lgregg @johncarlosbaez Plasma is defined as electrically neutral. |
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Post #ApO6KSluN9pZ8Ei64m by [email protected] |
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@dougmerritt @lgregg "I think that a hot gas stripped of its ions is a pla… |
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Post #ApO6Xrnkck4QWaxnou by [email protected] |
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@johncarlosbaez @mwl Fun to see continued updates on its project. My sister was… |
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Post #ApO6kpucxVIGQkMeA4 by [email protected] |
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@gumnos - your sister must be excited today! |
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Post #ApOEwddXDyrZSyVYau by [email protected] |
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@johncarlosbaez Being so close to the sun, can that probe send data back to ear… |
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Post #ApOEwdkcncXBoxpDe4 by [email protected] |
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@pirivan - it will send data back when it swings back out. It's been orbi… |
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Post #ApOFY6ELsO0MrZakM4 by [email protected] |
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@justlistening @johncarlosbaez Millions of degrees Cool! :blobcatgiggle2: |
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Post #ApOFY6NDLR5tJ3jpAW by [email protected] |
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@WastelandWandrr @justlistening - I looked it up, and apparently the probe will… |
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Post #ApOO1VXTernZO44UD2 by [email protected] |
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@Wrecks0 - like on the Pink Floyd album Dark Side of the Sun. |
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Post #ApOTgBSbiKcQl50bAG by [email protected] |
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@johncarlosbaez The Sun is all hot gas?The Sun is a miasma of incandescent plas… |
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Post #ApOTgBZhHyI374KGDQ by [email protected] |
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@VisualStuart - Heh - sorry, Sun.Btw, I said "hot gas" with "ato… |
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Post #ApOVQoKJdso0ZhvZnE by [email protected] |
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@johncarlosbaez I wonder if there exists a fluid-dynamical framework for Alfvé… |
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Post #ApOZpyWHHXRtFBmGkC by [email protected] |
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@pschwahn - the deepest equations in this subject are the Vlasov-Maxwell equati… |
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Post #ApOa8mI4yOuMoo6OUi by [email protected] |
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@johncarlosbaez Every diehard fan of They Might Be Giants knows the true nature… |
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Post #ApOa8mO6bzjF7UvCt6 by [email protected] |
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@VisualStuart - I'm a fan but apparently not a die-hard! |
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Post #ApOnUhA61NVKge9K52 by [email protected] |
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@johncarlosbaez how much faster does it have to go to travel back in time and s… |
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Post #ApOpxsypMO2He9vRAW by [email protected] |
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@duckwhistle |
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Post #ApOyeDU2JoR325DdZ2 by [email protected] |
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@johncarlosbaez hmm looks like in a dielectric, EM waves only interact with the… |
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Post #ApPGOIaLNghLOfjF7g by [email protected] |
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@johncarlosbaez The other place where solar wind is pretty interesting is the h… |
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Post #ApPaIPC76u9vrcokUK by [email protected] |
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@RCreamer - wow, I loved the Lucky Starr series when I was a kid exploring the … |
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Post #ApPbgAUNXJ2P9zFuds by [email protected] |
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@weekend_editor - Neat! Has a Voyager reached the heliopause yet? I'm pr… |
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Post #ApPceJOHZKrs8w5CM4 by [email protected] |
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@johncarlosbaez Voyager 1 & 2 have (2012 and 2018, respectively). One can … |
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Post #ApPecZ0cjFqXubJKqW by [email protected] |
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The tool I work on has an alfven wave simulation example if you want to take a … |
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Post #ApPecZ98DceUKzI86i by [email protected] |
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@p @wolf480pl "Meanwhile in case of Alfvén waves, according to the wikipe… |
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Post #ApPfP5NfftaED9EDNw by [email protected] |
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@johncarlosbaez Fascinating post! How on earth do those six planets endure the … |
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Post #ApPfP5V7EDXQaEi9zM by [email protected] |
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@druid - great question! I had to look up the answer on Wikipedia. TRAPPIST-1… |
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Post #ApPfeiOCvKm7XPvpFg by [email protected] |
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@weekend_editor - thanks for the information! Yes, I remember hearing about so… |
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Post #ApQ7sd54FuINqOP0ng by [email protected] |
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@johncarlosbaez @justlistening To add to another toot about #marshmallows cooki… |
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Post #ApQ8t4uItiMO6H95ai by [email protected] |
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@WastelandWandrr @justlistening - they always say a major spinoff of Apollo pro… |
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Post #ApQCTsf1gyB0hCEwds by [email protected] |
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Here's another way to look at it:https://xkcd.com/3029/ |
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Post #ApQLtcQtY5WfTxyhKC by [email protected] |
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@johncarlosbaez So if my math is correct, Parker is at about 4% of the distance… |
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Post #ApQNuePrrMo5pd7KyG by [email protected] |
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@dadakopf - yes, that's about what I get too! So the Earth is about 25 ti… |
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Post #ApQZXKyXAnncKIywQC by [email protected] |
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@johncarlosbaez has anyone made any recordings of what this sounds like? Or sim… |
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Post #ApQeyGA9fpyOzS4g9g by [email protected] |
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@battaglia01 - there are some nice solar winds sounds here, and 1, 3, 4 and 5 a… |
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Post #ApRAdW7KMEnGvKu9zs by [email protected] |
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@johncarlosbaez @p Merry Christmas!Thanks for linking to the MHD equations.The … |
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Post #ApRIV4GMpmyPqtcCmm by [email protected] |
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@johncarlosbaez You might be amused by the story of restoring Voyager I to comm… |
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Post #ApROVpGof6U5MqZOb2 by [email protected] |
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@johncarlosbaez It’s kind of hard to imagine a sun 15,000 times brighter. All… |
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Post #ApRVey7Zp5G36UYTBI by [email protected] |
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Shouldn't it be 25²=625 times brighter? Maybe that's not quite right, … |
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Post #ApRbGTVcaP9Yw8VOM4 by [email protected] |
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@RefurioAnachro @dadakopf - I must have been falling asleep! I said "squa… |
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Post #ApRgM8XlwmcTQF1xLM by [email protected] |
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@johncarlosbaez @p and it tries to make an argument that this field is perpendi… |
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Post #ApRgM8j7Gbh3zQL11c by [email protected] |
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@wolf480pl - thanks for looking into it. It'll take me a while to figure o… |
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Post #ApRi3KOjqgeSasxpk8 by [email protected] |
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> I can argue that the fact that it's not a point source makes it less b… |
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Post #ApRsU9GsKDrXReiJg8 by [email protected] |
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@johncarlosbaez @p right, B is a sourceless field, so its divergence is zero.As… |
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Post #ApSR9agWhf70mWe1yq by [email protected] |
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@johncarlosbaez Thank you sharing. I bet our ideas of "nice, simple formu… |
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Post #ApSR9apOAiCXE0n6nI by [email protected] |
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@Bobsee - so you didn't run off, read the link I offered, and ogle equation… |
