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 love the way everyone uses different names for parameters, and does everything from the POV of an observational astronomer ... Really useful for simulation work.
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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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@Alberto cazzarola! Come sta andando?
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Questa è una foto fatta male dell'A1 dopo Sasso Marconi verso nord. Non si capisce un tubo. Sullo sfondo nero, a sinistra della foto, si vedono le luci bianche e rosse delle macchine. Tuttavia c'è anche un puntino luminoso nella parte destra.
Quel coso è San Luca e significa che sono a casa. ❤️💙
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@GustavinoBevilacqua patatine che sono state passate su un nastro trasportatore con sopra appesi dei tartufi? :D
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@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"
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Sono stato bloccato su Wikipedia perché mi sono dimenticato di disattivare il mio VPN. Boh. Non posso più contribuire fino al 2027. Va bene tutto ma siamo nel 2025 usare un VPN ormai è una cosa comune. Wikipedia aggiornati e trova un modo più intelligente per individuare le persone fraudolente.
Il mio blocco è ingiustificato e mi sembra un’esagerazione. Qualche esperto che riesce a darmi una mano a sbloccare la situazione? Fanno passare la voglia così
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@scario
Perché cerchi una "piattaforma"? Devi monetizzarla?
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@glitch 🙏
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Oggi alla Coop di Cuneo ho trovato queste, ma non ho avuto il coraggoi di comperarle (il prezzo non si vede ma erano pure care).
