i nerd sniped myself tonight and i imagine the NSA operative who is assigned to me is very confused by the increasingly erratic and frustrated google searches for HOW DO I CALCULATE THE MOON WHERE IS THE MOON
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ok so back to the moon thing, i found another resource and i think i understand the why behind the asinine coordinate systems a little better but it also glosses over the math so it's kinda useless at the same time. i'm tempted to just make shit up and move on, but it would bother me that the function was wrong if i did that
@aeva i believe all our physical models diverge from reality on a long enough timescale. even quantum mechanics. every model is lossy compression / fitting of reality that we extrapolate from, starting at the time that the underlying measurements were taken.
best thing i can think of is measure exact position of celestial bodies, then run a sufficiently detailed n-body sim with best guesses for all state we can not measure, starting at that point. and then restart every year.
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@aeva is this one of those things where the approximate solution that drifts from reality by 0.0004% every year is like 3 lines and the more correct one is 5 pages of dense research and no one who writes about it is concerned with the idea that a reader may be a beginner and not know the difference
@halcy there's no closed form solution at all and from what i can tell the good solutions need to be rejiggered every few decades to stay accurate
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@halcy there's no closed form solution at all and from what i can tell the good solutions need to be rejiggered every few decades to stay accurate
@halcy the real problem here is that academic astronomy best practice is to tie everything into spherical coordinates on the firmament so they can factor out the earth enough that you can pretend it is a fixed vantage point that doesn't spin, and if god forbid you do need to tie an observation to geographic coordinates for some reason i guess you just burn an undergrad on it and not sully yourself with the indignity
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@halcy the real problem here is that academic astronomy best practice is to tie everything into spherical coordinates on the firmament so they can factor out the earth enough that you can pretend it is a fixed vantage point that doesn't spin, and if god forbid you do need to tie an observation to geographic coordinates for some reason i guess you just burn an undergrad on it and not sully yourself with the indignity
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@halcy the real problem here is that academic astronomy best practice is to tie everything into spherical coordinates on the firmament so they can factor out the earth enough that you can pretend it is a fixed vantage point that doesn't spin, and if god forbid you do need to tie an observation to geographic coordinates for some reason i guess you just burn an undergrad on it and not sully yourself with the indignity
@halcy i've got a feeling that this is what a self taught programmer feels when they try to work out how to sort stuff faster and everything they find is either programmers telling eachother to just use a library or academic formalist nonsense
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@halcy the real problem here is that academic astronomy best practice is to tie everything into spherical coordinates on the firmament so they can factor out the earth enough that you can pretend it is a fixed vantage point that doesn't spin, and if god forbid you do need to tie an observation to geographic coordinates for some reason i guess you just burn an undergrad on it and not sully yourself with the indignity
@aeva i guess that feels to me like it makes sense historically but maybe not…. anymore?
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today's extremely basic astronomy question that i'm finding surprisingly difficult to find an answer to: are geographic coordinates and equatorial coordinates the same coordinate system except one is for looking up and the other is for looking down, or is there some essential conversion step needed to correlate them?
@aeva geographic lat long is relative to the an ellipsoid. 0 degrees longitude is fixed to the surface of the earth.
Equatorial is a sphere and the longitude equivalent doesn’t rotate with the earth.
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@aeva geographic lat long is relative to the an ellipsoid. 0 degrees longitude is fixed to the surface of the earth.
Equatorial is a sphere and the longitude equivalent doesn’t rotate with the earth.
@jkaniarz where I currently am stuck is how do you convert between the three when it is not the vernal equinox
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@aeva i guess that feels to me like it makes sense historically but maybe not…. anymore?
@halcy well, historically astronomy was among other things at times significantly concerned with answering the question "where the hell am I", whereas modern astronomy seems to be more split between "what is that specific bright object" and "visible spectrum is cringe"
Gli ultimi otto messaggi ricevuti dalla Federazione
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@maza prova a chiedere a chiunque non sia un matematico cosa conosce dei lavori scientifici di Odifreddi... zero. Odifreddi, in quanto personaggio pubblico, è conosciuto solo per i teatrini patetici che è andato a cercarsi in TV. Vero che su YouTube trovi alcune sue "lezioni" di storia della scienza, ma sono eventi che potrebbe aver messo su chiunque.
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Siamo sempre alla ricerca della felicità ma spesso dimentichiamo che la felicità è nelle piccole cose racchiuse tra il buongiorno del della mattino e la carezza sera.
la felicità è fatta di piccoli attimi
Buonanotte 💖
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Bisogna scegliere di amare, non di possedere. Scegli la libertà tua… e lascia libera quella dell’altro.
Perché chi resta davvero, non ha bisogno di catene. Resta perché sente.. e se stai soffrendo per un amore che non torna non forzare l'universo ma forza te stesso a ricordare il tuo valore❤️
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@maza non è questione di simpatie. Uno che va a cercare lo scontro con i preti con l'assurda pretesa di dimostrare l'inesistenza di dio e di delegittimare la fede, o è un cretino o è uno molto furbo. Ha anticipato le strategie dei Vannacci e di altri che oggi fanno lo stesso gioco sfruttando mezzi molto più potenti. Politicamente è una nullità proprio sui temi e problemi che ha cavalcato per costruire il suo personaggio pubblico e vendere i suoi inutili libri (che ho letto da non credente).
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@nemobis Guarda non saprei dirti. Penso sia quello perché mi dice che ho utenze multiple. Sono completamente allibito. Punto in più per i sistemi decentralizzati. Ho fatto ricorso ma l’amministratore medio di Wikipedia è un boomer con 7 chat di buongiornissimo su whatsapp.
Giuro che mi faccio un’istanza su ibis.wiki con blackjack e squillo di lusso
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Se a qualcuno serve una slide per un talk in cui devono parlare di caccia ai bug, questo può essere utile
commons.wikimedia.org/wiki/Fil…
(sì, oggi stavo preparando le slide per un talk, perché?)
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If anybody needs to make a slide for a talk where they are talking about bug hunting / bug squashing, this may be useful
commons.wikimedia.org/wiki/Fil…
(yes, today I have been preparing slides for a talk, why do you ask?)
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@GustavinoBevilacqua esattamente ciò a cui stavo riferendomi!
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