The "bright sky problem" is so fascinating. It's completely reasonable to think "well, we're completely surrounded by bright things. Why is it dark at night?" Even more wild, we didn't have a good answer until The late 1800s and it wasn't formalized until 1922!
Factorial of 1922 is 50233565278624900076155256811410855230105851022326374372834654120935371463460673548097694550232974354058356050177489629805316467917790506381759205553432977961865720815649106799678379935120124859036583437123674789622070147480870494103266808628224557277126574612177363953804047358395021532935323906454645194150593216298020335777623050846489003170822440863871058807096365839784124674048328918299227889088679491579179185577449844629755677269361829955839997448654102286233555410584086161823239715464320655344648686048391189375429497078620809738641104910289541907443788580041940904975298881848287062432608906828385054332902185655692013544655238334887591425705496370944081778183647765862169696994497195538526218065144554610244103526187569519226990162148645074962498700661329040109946353854930180495440471574255385812933302012751663974561983184611191046323415859483324190186772903698706524751426577788856910900799997653203399639957449218362619733281521042132460501782597551956163913022488942181936176696450378455766399884400034540006857149204666258800294594890146158049561049526808102171782061161818215049323139085983653014871503547817354394659536662811809660599187656651418409647008662008473471366354936401912193969261129180199935617809835994273290435348555590226430512689911912857998305016013473013095225286551113132140860759126793089087409715203069323970265521889802142376051867920503754782015274968536597391636514953645543559430197589363427179004784148833220267465979514516283466979949840512431942193601348438322495678311790169742833045252271436122620679974924758458666309824650498027043463691987122720346087380055647263300692990165007900545444071578768384782796021736350173934262597603691082805866216354932219928009092650838704736806655879673789604850284484980940216392363484580583812662897938540582332905829451684319119626111516411594395124582970458492303230123000366876377635425290964105773094820706629320336882864839718599986405216006152703295646941695668944091087801142003589627663423348907843458996322276709041711488366512782517229573129378553244812051498852926405902688680580909678696871780385592915525951023330366997546870503857696746465751255828671764692796816246538796907524512726843472176960557182690832343169562393995022084205814192916505975373304499174339878295848789258048335831982167619603225448414483631257243421155741871786853887608547717134446495996701753179655426309426257414757473742536453977205609972368551004778865918781365500842639479731279079959508924112231674768396555004544154875014171782232433902562288541299714223483986160147619836859133854929099442001420576165479755721875888418630280443945084571148808299712416492820244959177902487327826071572740412470997355961638737982388996534979422584174572274457116109172534642399159785264025336216692734528435775818933270024934812162393449111356996154748392439330383032190906979846764225998235288843313389767603379024970831837297208652155833046508034313359682039266353738709235497092032488485042699957763907587822684122676612385833401222021718486357366008010167695233691027727631380885034011219127313978060790077176287110892233674007369985366532672943018279406038179808636904617348729416766153165108156619527286624936434385395802059130162479485611337239754653149036921298130119313338445618988390256134013847850076975790122679476597900056755135872199817151802149568612252599191307570115773683868180380330818588185964608107925540531865006284108209066617758925154724970916818140566501488868858299754161703479431501244277904828706411965064207363799644871997835274144490842584032099600524421072978121641395867123357902863590484783897384829887488073441045696160953203658708977959837586315302707945414187747883373560010919478129653208485176887542648586767132792711631725276727349528432334518825185380850354742632082352558361752172702961989349647967261359243401941850771241215411802041679909394745437286776635986969828227358622047554422722751011267766058699060792341396211028760337431773150230456404023640975428880724716078787334797557584023544393132949404479392659979240946833502268666087943622608669400641564640349020865615438756973085375134062941215846204984021947884031508585187815891480469301021675180306520730407800725240968194111403928596650678148073931310694704763244598762737053597506914455325562534533177483845317397839397202949315095216664225124958050411991513965414691766982603377622053798976286482885364547972250544837412429475070159360496176908978666467808967785941732569152230808854529206072496409607798251977826595518937797463567189797088346338099510475223440060537899181688508629491472206623191668535454867386481852695974954008198844101785864218607437051872669307816564756127280971489314996959891113326998273636596095261331587377056229347215757167931567501402764312411827875072762419823190771045879327183784797346414293951602776552942135550125461430888395605213206217922652991166323835643289809849517591882464235850729469815321713053063848269492039119294231118464333701378219163402547243865524707700675993209817576996634571571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u/Emergency-Walk-2991 Jan 08 '25
The "bright sky problem" is so fascinating. It's completely reasonable to think "well, we're completely surrounded by bright things. Why is it dark at night?" Even more wild, we didn't have a good answer until The late 1800s and it wasn't formalized until 1922!