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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@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"
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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 have copies of the explanatory supplement to the astronomical almanac in case i ever get enough of an urge to write astronomical software – both the 1960s edition and the more recent third edition that takes into account modern atomic time and general relativity and 🤯
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@aeva i have copies of the explanatory supplement to the astronomical almanac in case i ever get enough of an urge to write astronomical software – both the 1960s edition and the more recent third edition that takes into account modern atomic time and general relativity and 🤯
@fanf I just put in an order for the 2025 Astronomical Almanac - what is this about an explanatory supplement?
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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
after a good night's sleep and reflecting on what I've learned so far, I've decided to follow the classic computer science strat: when faced with a problem you don't know how to solve, simply do something else, and pretend that is what you meant to do all along.
not only are horizontal coordinates the choice reference frame for backyard astronomers, the "altitude h" angular measurement is probably closer to the solution I wanted than my earlier framing of the problem. narf
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@fanf I just put in an order for the 2025 Astronomical Almanac - what is this about an explanatory supplement?
@aeva https://aa.usno.navy.mil/publications/exp_supp roughly speaking it explains the mathematical models used to caclculate the almanac
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@jkaniarz where I currently am stuck is how do you convert between the three when it is not the vernal equinox
@aeva If you know the position at the previous equinox, I think it’s as simple as spinning the moon around the earth (in the plane of the moons orbit) for 2*PI*t/27.3 radians, then spinning the earth for 2*PI*t radians.
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@aeva https://aa.usno.navy.mil/publications/exp_supp roughly speaking it explains the mathematical models used to caclculate the almanac
@fanf that sounds useful. looks like it is out of print though?
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after a good night's sleep and reflecting on what I've learned so far, I've decided to follow the classic computer science strat: when faced with a problem you don't know how to solve, simply do something else, and pretend that is what you meant to do all along.
not only are horizontal coordinates the choice reference frame for backyard astronomers, the "altitude h" angular measurement is probably closer to the solution I wanted than my earlier framing of the problem. narf
the math's not quite right, but i managed to get the moon more or less working
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@aeva god, on the 3rd day:
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This is the best post to read entirely out of context that I have seen in years.
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astronomy math is out of this fucking world btw like want to know where the moon is? great buckle up you're in for a few hundred years of bizarre hacks and lots of exciting questions like "wait, why are they using the julian calendar?"
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This is the best post to read entirely out of context that I have seen in years.
@CliftonR :3
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@aeva god, on the 3rd day:
@halcy :3
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astronomy math is out of this fucking world btw like want to know where the moon is? great buckle up you're in for a few hundred years of bizarre hacks and lots of exciting questions like "wait, why are they using the julian calendar?"
in a way magpie math is kinda refreshing, like imagine not throwing everything away every few years because of industry fads
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Questo post è eliminato!
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astronomy math is out of this fucking world btw like want to know where the moon is? great buckle up you're in for a few hundred years of bizarre hacks and lots of exciting questions like "wait, why are they using the julian calendar?"
@aeva I think part of it is we stopped trying to guess based on date and moved to measurements and short term extrapolation
Gli ultimi otto messaggi ricevuti dalla Federazione
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Trieste Next, oltre cento eventi sulla ricerca scientifica
@scienza (HASHTAG)
Il festival in programma dal 26 al 28 settembre
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@talksina @storiespettinate per curiosità, perché ad un cliente dovrebbe interessare da chi è scritto un articolo, una volta che la qualità, il copyright e i diritti sono ok? Io valuterei solo il ritorno di investimento e la fiducia in chi lo propone. Di sicuro la AI è un concorrente difficile per i contenti creator: gli articoli poco importanti, lettere formali o cose di questo tipo li faccio scrivere direttamente da AI. Se uso un intermediario è perché voglio un parere di un esperto.
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@informapirata @informatica la cosa in sé è ovviamente un gimmick (nel senso, a bordo del micro c'è un server web minimale che di fatto parla su una seriale buttando fuori del testo fisso o giù di lì, e poi dall'altro lato per collegarlo a Internet c'è un computer "vero"), la cosa incredibile è che dentro a un oggetto usa e getta c'è un microcontrollore da 24 MHz con 4 KB di RAM che all'ingrosso costa circa 8 centesimi.
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La Germania innova a rilento. Ifo Institute: “Concentrati su tecnologie mature, quasi per niente su R&S”
@news
https://www.eunews.it/2025/09/15/ifo-germania-investe-poco-in-ricerca/
L'obiettivo per il 2030 è il 3,5 per cento del Pil in ricerca e sviluppo. Per l'Istituto Ifo: "Non bastano i soldi pubblici ma è anche necessario un investimento privato nel settore”
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@coso_come_se_chiama perché alzare gli stipendi se puoi fare gli hunger games della salute mentale?
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#OtD 15 Sep 1897 an appeal to women workers written by Italian textile militant and anarchist-feminist, Maria Roda, was published in Paterson, NJ. She raised eight children (pictured) and helped organise textile, cigar and dockworkers https://stories.workingclasshistory.com/article/8738/"to-women-workers"
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@storiespettinate non c'entra assolutamente nulla l'intelligenza artificiale ma soltanto La proverbiale la resistenza delle aziende italiane a pagare i fornitori. Tutte le scuse sono buone. Fategli scrivere dall'avvocato e non temete il fatto che poi non vorranno più lavorare con voi: clienti del genere sono una rogna per qualsiasi azienda.
Anzi, sputtanateli per inadempienza contrattuale
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Verona: speciale tumulto pride con le voci della piazza “per l’autodeterminazione collettiva”
@anarchia
Sabato 13 settembre a Verona, duemila persone hanno sfilato nel corteo del Tumulto Pride. Una giornata di festa, di amore e di conflitto. La parola chiave della giornata è stata intersezionalità: le questioni e le rivendicazioni queer si sono https://www.rivoluzioneanarchica.it/verona-speciale-tumulto-pride-con-le-voci-della-piazza-per-lautodeterminazione-collettiva/
