UmbralRaptor changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
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<_whitenotifier-d13c> [Principia] modwizcode starred Principia - https://git.io/V65kMA
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<egg|cell|egg> Cat is loud
<raptop> have you tried attaching anecholic tiles to it?
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<_whitenotifier-d13c> [Principia] pleroy labeled pull request #2633: Bulletin C 60 - https://git.io/JJt7l
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<_whitenotifier-d13c> [Principia] mtwilliams starred Principia - https://git.io/fzUmnA
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<egg|anbo|egg> !wpn whitequark
<egg|anbo|egg> !wpn whitequark
* galois gives whitequark a chocolate crow with a chonk attachment
<egg|anbo|egg> chonk attachement
<whitequark> cat seems fine so far
<whitequark> i have already immolated another wasp (or could be the same)
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<raptop> ...if there were a p-zombie apocalypse, would anyone know?
<egg|anbo|egg_> whitequark: glad to hear the cat is OK
<egg|anbo|egg_> please pet
<egg|anbo|egg_> (the cat, not the wasp)
<egg|anbo|egg_> (do not pet the wasp)
<raptop> pet the wasp with a fire elemental
<egg|anbo|egg_> raptop: hm, Stellarium does’t have NEOWISE
<egg|anbo|egg_> FAST ?
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<egg|anbo|egg__> FAST?
<galois> FAST: Five-hundred-meter Aperture Spherical radio Telescope
<egg|anbo|egg__> LAMOST?
<egg|anbo|egg__> !acr -add:LAMOST Large sky Area Multi-Object fibre Spectroscopic Telescope
<galois> Definition added!
<egg|anbo|egg__> DORIS?
<galois> DORIS: Détermination d’Orbite et Radiopositionnement Intégré par Satellite / Doppler Orbitography and Radiopositioning Integrated by Satellite
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<_whitenotifier-d13c> [Principia] eggrobin labeled pull request #2632: A stray commit. - https://git.io/JJLwI
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<egg|anbo|egg__> whitequark: amusingly describing this motion summons elliptic integrals https://twitter.com/whitequark/status/1280754005686333440
<egg|anbo|egg__> > point out that this will not happen to earth because the periodic flipping is only valid for rigid bodies
<egg|anbo|egg__> even with rigid bodies this only happens if the axis of rotation is near the intermediate axis of inertia
<egg|anbo|egg__> which is very much not the case of the Earth
<whitequark> hm
<raptop> !choose earth is a viscous liquid|earth is a vicious liquid
<galois> raptop: Your options: earth is a viscous liquid, earth is a vicious liquid. My choice: earth is a viscous liquid
<egg|anbo|egg__> the coloured curves are the trajectories of the angular velocity vector in a body-fixed frame
<whitequark> this is way over my head
<egg|anbo|egg__> if the angular velocity is close to the m3 or m1 axis, it will follow a smol circle about that axis (like the blue or red curve, but more smol)
<egg|anbo|egg__> if it is near m2, it will follow a wide taco-edge-shaped curve like that
<egg|anbo|egg__> which means it will go near m2, and then near -m2
<egg|anbo|egg__> in other words, it will flip
<whitequark> ohh
<whitequark> i see
<egg|anbo|egg__> (and in the limiting case when it is on the planes it will take an infinite time to go to either m2 or -m2
<egg|anbo|egg__> )
<egg|anbo|egg__> (this never happens but it tells you that the closer you are to m2 or -m2, the longer the time between flips is
<egg|anbo|egg__> so you get this "long stable-looking spinning, flip, long stable-looking spinning, flip" behaviour
<egg|anbo|egg__> whereas if you are halfway between m2 and m3 you get a mess
<egg|anbo|egg__> I can probably show that more concretely with Principia now that it actually implements that corrcetly
<egg|anbo|egg__> (note: PhysX gets this wrong)
<egg|anbo|egg__> (this has wasted a lot of our time)
<egg|anbo|egg__> whitequark: https://www.youtube.com/watch?v=THAAmB67DWU is a pretty nice video in ru
<raptop> "(The interested reader can look at the definition of the polhode and the herpolhode in Wikipedia in French, German or Spanish; the English article is lame.)"
<raptop> okay
<egg|anbo|egg__> and then we point to a russian video
<raptop> Well, yes
<egg|anbo|egg__> whitequark: note how the random cubical box and the cosmonaut food tin cannot exhibit the flipping behaviour
<egg|anbo|egg__> Earth is a cosmonaut food tin
<whitequark> nice
<egg|anbo|egg__> but as soon as you have a thing that doesn’t have symmetries, Джанибеков can strike
<egg|anbo|egg__> plenty of people encounter that now that Principia has correctly implemented rotation, they try to spin-stabilize and the axis they want to stabilize on is unstable
<egg|anbo|egg__> I should make food, I’ll see if I can make some interesting Principia eggsamples later
<raptop> presumably a hard boiled egg is sufficiently rigid and triaxial?
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<egg|cell|egg> Not sure about the rigidity but it's not very triaxial
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<egg|anbo|egg__> !choose digest|eggsplain the Джанибеков effect
<galois> egg|anbo|egg__: Your options: digest, eggsplain the Джанибеков effect. My choice: eggsplain the Джанибеков effect
<egg|anbo|egg__> ;choose digest|eggsplain the Джанибеков effect
<egg|anbo|egg__> galois: did you eat kmath
<raptop> !seen kmath
<galois> raptop: I last saw kmath in here 7 days, 14 hours ago, saying: YouTube - The Distinctive Calls of Owls: A Sampler
<SnoopJeDi> haha
<SnoopJeDi> !8 did you eat kmath
<galois> SnoopJeDi: yes
<SnoopJeDi> !why
<galois> SnoopJeDi: because reasons
<SnoopJeDi> bad bot
<galois> =[
* egg|anbo|egg__ pets a cat
<raptop> !how delicious was kmath
<galois> raptop: 962 delicious
<SnoopJeDi> wow
* egg|anbo|egg__ pets the cat’s claws
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<raptop> !wpn WeylandsWings
* galois gives WeylandsWings a cnoon
<WeylandsWings> no idea what that is
<raptop> a what
<WeylandsWings> !wpn raptop
* galois gives raptop a GNOME magnetoresistance
<WeylandsWings> GNOME?
<WeylandsWings> !expand GNOME
<raptop> !acr -add:GNOME GNU Network Object Model / Global Network of Optical Magnetometers to search for Exotic physics
<galois> Definition added!
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<UmbralRaptop> "Highly qualified final year undergraduate students or those who have received an undergraduate degree of all disciplines may apply for the DAAD Study Scholarship for a full Master's degree program at a German university or for study at a German university as part of a postgraduate or Master's degree program completed in the home country."
<UmbralRaptop> In case e_14159_ needs a research assistant
<UmbralRaptop> !8 Would a large plush adequately mitigate feelings of touch starvation?
<galois> UmbralRaptop: yes
<_whitenotifier-d13c> [Principia] eggrobin pushed 3 commits to master [+0/-0/±8] https://git.io/JJqHf
<_whitenotifier-d13c> [Principia] eggrobin 98ae23b - NO leap second will be introduced at the end of December 2020.
<_whitenotifier-d13c> [Principia] eggrobin 1be5da7 - Earth orientation parameters.
<_whitenotifier-d13c> [Principia] eggrobin 2cdf602 - Merge pull request #2633 from eggrobin/bulletin-c-60 Bulletin C 60
<_whitenotifier-d13c> [Principia] eggrobin closed pull request #2633: Bulletin C 60 - https://git.io/JJt7l
<WeylandsWings> UmbralRaptop: weighted blankets might help
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<egg|anbo|egg__> !choose sleep|don’t
<galois> egg|anbo|egg__: Your options: sleep, don’t. My choice: don’t
* raptop should probably look into one of those
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