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White Holes
A mesmerizing trip to the strange world of white holes from the bestselling author of Seven Brief Lessons on Physics and The Order of Time
Let us journey, with beloved physicist Carlo Rovelli, into the heart of a black hole. We slip beyond its horizon and tumble down this crack in the universe. As we plunge, we see geometry fold. Time and space pull and stretch. And finally, at the black hole鈥檚 core, space and time dissolve, and a white hole is born.听
Rovelli has dedicated his career to uniting the time-warping ideas of general relativity and the perplexing uncertainties of quantum mechanics. In White Holes , he reveals the mind of a scientist at work. He traces the ongoing adventure of his own cutting-edge research, investigating whether all black holes could eventually turn into white holes, equally compact听objects in which the arrow of time is reversed.
Rovelli writes just as compellingly about the work of a scientist as he does the marvels of the universe. He shares the fear, uncertainty, and frequent disappointment of exploring hypotheses and unknown worlds, and the delight of chasing new ideas to unexpected conclusions.听Guiding us beyond the horizon, he invites us to experience the fever and the disquiet of science鈥攁nd the strange and startling life of a white hole.
Let us journey, with beloved physicist Carlo Rovelli, into the heart of a black hole. We slip beyond its horizon and tumble down this crack in the universe. As we plunge, we see geometry fold. Time and space pull and stretch. And finally, at the black hole鈥檚 core, space and time dissolve, and a white hole is born.听
Rovelli has dedicated his career to uniting the time-warping ideas of general relativity and the perplexing uncertainties of quantum mechanics. In White Holes , he reveals the mind of a scientist at work. He traces the ongoing adventure of his own cutting-edge research, investigating whether all black holes could eventually turn into white holes, equally compact听objects in which the arrow of time is reversed.
Rovelli writes just as compellingly about the work of a scientist as he does the marvels of the universe. He shares the fear, uncertainty, and frequent disappointment of exploring hypotheses and unknown worlds, and the delight of chasing new ideas to unexpected conclusions.听Guiding us beyond the horizon, he invites us to experience the fever and the disquiet of science鈥攁nd the strange and startling life of a white hole.
176 pages, Hardcover
First published March 3, 2023
582 people are currently reading
6,207 people want to read
About the author
Carlo Rovelli
52听books3,750听followersCarlo Rovelli is an Italian theoretical physicist and writer who has worked in Italy and the USA, and currently works in France. His work is mainly in the field of quantum gravity, where he is among the founders of the loop quantum gravity theory. He has also worked in the history and philosophy of science. He collaborates regularly with several Italian newspapers, in particular the cultural supplements of Il Sole 24 Ore and La Repubblica.
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Displaying 1 - 30 of 687 reviews
February 18, 2025
Tutti hanno sentito parlare dei buchi neri -- sono diventati una parte integrante della cultura pop. Ma i buchi bianchi, cosa sarebbero? Per scoprirlo, dovrai leggere questo piccolo libro di Carlo Rovelli, un grande divulgatore della fisica moderna. Se, dopo averlo finito, sentirai che ancora non capisci cosa sono questi buchi neri invertiti che vengono chiamati buchi bianchi e come funzionano, non importa perch茅 nessuno lo sa per certo, neanche Carlo Rovelli.
Image credit: Wikimedia commons, "Kruskal diagram for an eternal black hole" by TimothyRias
Seriamente per貌, con i libri di Carlo Rovelli ho sempre lo stesso problema: da una parte, penso che non siano abbastanza chiari e diretti per qualcuno che di fisica non sa niente; dall'altra, sono troppo semplicistici e non abbastanza dettagliati se un lettore gi脿 sa qualcosa sul tema del libro, almeno un po' (come me).
Ma comunque, "Buchi Bianchi. Dentro l'orizzonte" apre una finestra nel mondo della ricerca scientifica, e da questa finestra si vede un viaggio affascinante che non finisce mai. Per me le frasi pi霉 esatte ed efficaci di questo libro sono state quelle liriche dove Rovelli diventa un poeta della scienza. Ed un altro bonus: mentre racconta la storia dei buchi neri e bianchi fa tanti riferimenti a Dante.;)
Image credit: Wikimedia commons, "White hole artistic recreation" by Baperookamo
Read in 2024.
Image credit: Wikimedia commons, "Kruskal diagram for an eternal black hole" by TimothyRias
Seriamente per貌, con i libri di Carlo Rovelli ho sempre lo stesso problema: da una parte, penso che non siano abbastanza chiari e diretti per qualcuno che di fisica non sa niente; dall'altra, sono troppo semplicistici e non abbastanza dettagliati se un lettore gi脿 sa qualcosa sul tema del libro, almeno un po' (come me).
Ma comunque, "Buchi Bianchi. Dentro l'orizzonte" apre una finestra nel mondo della ricerca scientifica, e da questa finestra si vede un viaggio affascinante che non finisce mai. Per me le frasi pi霉 esatte ed efficaci di questo libro sono state quelle liriche dove Rovelli diventa un poeta della scienza. Ed un altro bonus: mentre racconta la storia dei buchi neri e bianchi fa tanti riferimenti a Dante.;)
Image credit: Wikimedia commons, "White hole artistic recreation" by Baperookamo
Read in 2024.
March 7, 2023
Carlo Rovelli ritorna in libreria per parlare dei buchi bianchi: un viaggio molto emozionante alla scoperta della bellezza della Fisica. Mentre lo leggevo, mi sono chiesta se le pagine siano facilmente fruibili da chi non mastica fisica e/o matematica, o, pi霉 in generale, da chi non ha una formazione scientifica.
Che cos鈥櫭� un buco bianco?
脠 una soluzione delle equazioni di Einstein, cos矛 come lo sono i buchi neri, a tempo invertito, per貌.
鈥淣ei buchi neri si pu貌 entrare, e non uscire. Dai buchi bianchi, al contrario, si pu貌 uscire, e non entrare. (Se filmo cose che entrano in un buco e poi proietto il film all鈥檌ndietro, vedo cose che escono dal buco). Tutto quello che 猫 entrato nel buco nero pu貌 attraversare la zona
rossa, passare al buco bianco, e poi tornare fuori.
听
Semplice, no?鈥�
Ci貌 che lascia a bocca aperta 猫 scoprire che 鈥渧isti dall鈥檈sterno un buco nero e un buco bianco si comportano esattamente nello stesso modo: sono entrambi masse che attirano con la forza di gravit脿.鈥�
E allora cosa distingue un buco bianco da uno nero? Gli orizzonti.
鈥淕li orizzonti distinguono bianco da nero, futuro da passato, ma l鈥檈sterno no.
听
Il titolo del lavoro del 1958 dove David Finkelstein aveva mostrato cosa succede all鈥檕rizzonte era L鈥檃simmetria fra passato e futuro, nel campo gravitazionale... Il titolo sottolinea l鈥檌ntuizione chiave: la geometria dell鈥檈sterno del buco nero non cambia per inversione del tempo, ma questa simmetria si rompe sull鈥檕rizzonte: l鈥檕rizzonte non 猫 invariante per inversione del tempo. 脠 per questo che esattamente lo stesso esterno 猫 compatibile tanto con un buco nero che con un buco bianco, nonostante i loro orizzonti siano opposti.鈥�
Ma come si fa a ribaltare il tempo? Come si fa a far tornare integri dei bicchieri che si sono rotti?
A queste domande risponde Carlo Rovelli nell鈥檜ltima parte del libro.
鈥渦na parte della materia oscura potrebbe forse essere costituita proprio da miliardi e miliardi di questi piccoli, delicati buchi bianchi, che ribaltano il tempo dei buchi neri, ma non troppo, e fluttuano lievi nell鈥檜niverso, come libellule...鈥�
Che cos鈥櫭� un buco bianco?
脠 una soluzione delle equazioni di Einstein, cos矛 come lo sono i buchi neri, a tempo invertito, per貌.
鈥淣ei buchi neri si pu貌 entrare, e non uscire. Dai buchi bianchi, al contrario, si pu貌 uscire, e non entrare. (Se filmo cose che entrano in un buco e poi proietto il film all鈥檌ndietro, vedo cose che escono dal buco). Tutto quello che 猫 entrato nel buco nero pu貌 attraversare la zona
rossa, passare al buco bianco, e poi tornare fuori.
听
Semplice, no?鈥�
Ci貌 che lascia a bocca aperta 猫 scoprire che 鈥渧isti dall鈥檈sterno un buco nero e un buco bianco si comportano esattamente nello stesso modo: sono entrambi masse che attirano con la forza di gravit脿.鈥�
E allora cosa distingue un buco bianco da uno nero? Gli orizzonti.
鈥淕li orizzonti distinguono bianco da nero, futuro da passato, ma l鈥檈sterno no.
听
Il titolo del lavoro del 1958 dove David Finkelstein aveva mostrato cosa succede all鈥檕rizzonte era L鈥檃simmetria fra passato e futuro, nel campo gravitazionale... Il titolo sottolinea l鈥檌ntuizione chiave: la geometria dell鈥檈sterno del buco nero non cambia per inversione del tempo, ma questa simmetria si rompe sull鈥檕rizzonte: l鈥檕rizzonte non 猫 invariante per inversione del tempo. 脠 per questo che esattamente lo stesso esterno 猫 compatibile tanto con un buco nero che con un buco bianco, nonostante i loro orizzonti siano opposti.鈥�
Ma come si fa a ribaltare il tempo? Come si fa a far tornare integri dei bicchieri che si sono rotti?
A queste domande risponde Carlo Rovelli nell鈥檜ltima parte del libro.
鈥渦na parte della materia oscura potrebbe forse essere costituita proprio da miliardi e miliardi di questi piccoli, delicati buchi bianchi, che ribaltano il tempo dei buchi neri, ma non troppo, e fluttuano lievi nell鈥檜niverso, come libellule...鈥�
March 3, 2024
I always enjoyed physics at school even though I sometimes struggled to process the concepts. The teacher would start explaining something like relativity and I'd feel my brain stretching like an elastic band as I strained to understand it, before snapping back into place. I never thought I'd be reading a book on the subject for fun, but I received this one as a Christmas present, so here we are.
From what I gather Carlo Rovelli excels at explaining physics to unscientific minds like my own. In this volume he discusses the idea of white holes, the existence of which is not universally acknowledged. Basically they are the opposite of a black hole and can be found across the event horizon. In the same way matter cannot exit a black hole, it can't enter a white hole from the outside. However, although black holes in space have since been identified and photographed, white holes have not.
Rovelli uses quantum mechanics to explain this theory and it gets pretty heavy at times, though he does give the reader permission to skip ahead. I will admit I availed of this opportunity as I could feel my brain turning to mush. I definitely learned something from this book and it was a refreshing change of pace from my usual fare. Don't ask me to give a lecture on it though - it would be a very short and confused presentation.
From what I gather Carlo Rovelli excels at explaining physics to unscientific minds like my own. In this volume he discusses the idea of white holes, the existence of which is not universally acknowledged. Basically they are the opposite of a black hole and can be found across the event horizon. In the same way matter cannot exit a black hole, it can't enter a white hole from the outside. However, although black holes in space have since been identified and photographed, white holes have not.
Rovelli uses quantum mechanics to explain this theory and it gets pretty heavy at times, though he does give the reader permission to skip ahead. I will admit I availed of this opportunity as I could feel my brain turning to mush. I definitely learned something from this book and it was a refreshing change of pace from my usual fare. Don't ask me to give a lecture on it though - it would be a very short and confused presentation.
February 20, 2024
Un libro snello e agevole che, attraverso metafore letterarie e non, permette di accostarsi ad una delle teorie pi霉 affascinanti della fisica contemporanea. Un plauso alla capacit脿 divulgativa di Rovelli, che permette a tutti di immedesimarsi in piccoli scienziati, in cerca della conoscenza e del "senso" dell'esistenza.
November 4, 2023
This is my fifth Carlo Rovelli book on the areas he studies in theoretical physics. In each of his books he attempts to dumb-down the subject for the non-scientist to understand, which is commendable, but much of it is, simply, too advanced for some of us, myself specifically. This is about White Holes, which are completely theoretical and have never been observed and so are based only on mathematical calculations. These are the same calculations that describe Black Holes that were themselves theoretical for many years before they were finally verified by observation. White Holes, as I understand it, are Black Holes in which gravity has compressed matter down to the Planck scale, the point that cannot be compressed any further, and bounces back reversing time. Whereas nothing can escape Black Holes the reverse is true about White Holes and nothing can enter them. Rovelli writes about time quite a bit in his books and he does so again in this one. In this book he has an explanation for why time appears to run only one way, from past to the future, but it was completely above my ability to comprehend. It, apparently has something to do with equilibrium. Just like everything else I've read by Rovelli, I'm frustrated by my inability to fully grasp what he is saying but I absolutely love reading about it.
April 20, 2023
Questo matrimonio non s'ha da fare: tra me e Rovelli a quanto pare non 猫 proprio destino.
Faccio fatica anche a spiegare per bene il senso di fastidio che provo leggendo i suoi libri e la sua incredibile capacit脿 di assopirmi (cosa che leggendo non capita mai).
Per貌 vorrei provarci, giusto per dare un po' d'ordine alle mie idee.
Rovelli indaga una branca della scienza affascinante, che parte dalla fisica e tocca l'astronomia. Lo fa con indiscutibile talento ma anche con un'insopportabile presunzione e supponenza. Non si tratta di voler raccontare ci貌 che studia e analizza, che 猫 interessante e ai limiti del misterioso e charmant, ma del modo in cui ci racconta come lo fa: con sufficienza quando parla dei colleghi che non condividono le sue teorie, con aria di stizza rispetto ai suoi lettori detrattori.
Al contrario di tanti scienziati che si cimentano nel comunicare le loro ricerche a me sembra sempre che Rovelli si autocompiacia non solo delle sue capacit脿 ma anche di come nello scrivere riesce a complicare le cose per darsi un tono.
Non riesco a provare simpatia o empatia per il suo modo di raccontare, perch茅 sembra fomentare la nebbia attorno al concetto apposta. Peccato.
(Se ve lo chiedete il libro 猫 un regalo)
Faccio fatica anche a spiegare per bene il senso di fastidio che provo leggendo i suoi libri e la sua incredibile capacit脿 di assopirmi (cosa che leggendo non capita mai).
Per貌 vorrei provarci, giusto per dare un po' d'ordine alle mie idee.
Rovelli indaga una branca della scienza affascinante, che parte dalla fisica e tocca l'astronomia. Lo fa con indiscutibile talento ma anche con un'insopportabile presunzione e supponenza. Non si tratta di voler raccontare ci貌 che studia e analizza, che 猫 interessante e ai limiti del misterioso e charmant, ma del modo in cui ci racconta come lo fa: con sufficienza quando parla dei colleghi che non condividono le sue teorie, con aria di stizza rispetto ai suoi lettori detrattori.
Al contrario di tanti scienziati che si cimentano nel comunicare le loro ricerche a me sembra sempre che Rovelli si autocompiacia non solo delle sue capacit脿 ma anche di come nello scrivere riesce a complicare le cose per darsi un tono.
Non riesco a provare simpatia o empatia per il suo modo di raccontare, perch茅 sembra fomentare la nebbia attorno al concetto apposta. Peccato.
(Se ve lo chiedete il libro 猫 un regalo)
January 5, 2025
喔∴覆喔傅喔佮箒喔ム箟喔о竸喔｀副喔氞箑喔ム箞喔∴笚喔掂箞喔椸赋喙冟斧喙夃釜喔∴腑喔囙箑喔｀覆喔｀赴喙€喔氞复喔斷箑喔涏箛喔權笀喔膏笓 "喔弗喔膏浮喔傕覆喔�" 喔椸傅喙堗箑喔涏箛喔權箑喔浮喔粪腑喔權笭喔侧竸喔佮弗喔编笟喔傕腑喔� "喔弗喔膏浮喔斷赋" 喙佮笝喙堗笝喔笝喔о箞喔侧笝喔掂箞喙€喔涏箛喔權箑喔炧傅喔⑧竾喔椸袱喔┼笌喔掂涪喔编竾喙勦浮喙堗浮喔掂箖喔勦福喔勦箟喔權笧喔� 喙佮弗喔班浮喔编笝喔覆喔堗笀喔班箘喔∴箞喙冟笂喙堗竸喔о覆喔∴笀喔｀复喔囙竵喙囙箘喔斷箟 喔覆喔堗笀喔班箘喔∴箞喔∴傅喔弗喔膏浮喔傕覆喔о笀喔｀复喔囙箚 喔涪喙堗覆喔囙笚喔掂箞 Carlo Rovelli 喔氞腑喔� 喙佮笗喙堗笝喔编箞喔權箑喔涏箛喔權箑喔｀阜喙堗腑喔囙箖喔權腑喔權覆喔勦笗喔椸傅喙堗笗喙夃腑喔囙福喔箖喔箟喔∴傅喔勦笝喔勦箟喔權笧喔氞箑喔浮喔粪腑喔權笚喔掂箞喙冟笝喔涏副喔堗笀喔膏笟喔编笝喙€喔｀覆喔勦箟喔權笧喔氞斧喔ム父喔∴笖喔赤箒喔ム箟喔� (喙冟笝喔笖喔掂笗喔∴副喔權箑喔涏箛喔權箑喔炧傅喔⑧竾喔浮喔佮覆喔｀競喔竾喙勦腑喔權箤喔箘喔曕笝喙� 喙佮笗喙堗箑喔椸竸喙傕笝喙傕弗喔⑧傅喔⑧副喔囙箘喔∴箞喔覆喔∴覆喔｀笘喔⑧阜喔權涪喔编笝喙勦笖喙夃抚喙堗覆喔∴傅喔弗喔膏浮喔斷赋喔涪喔灌箞喔堗福喔脆竾)
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Carlo Rovelli 喔⑧副喔囙竸喔囙箑喔傕傅喔⑧笝喔о复喔椸涪喔侧辅喔侧釜喔曕福喙屶竸喔о腑喔權笗喔编浮喔斷覆喔｀覆喔ㄠ覆喔笗喔｀箤喙勦笖喙夃竾喔斷竾喔侧浮 喙佮笗喙堗箘喔∴箞喙€喔浮喔粪腑喔權箑喔勦涪喙€喔椸箞喔侧箘喔� 喙€喔ム箞喔∴笝喔掂箟喔斷腹喙€喔浮喔粪腑喔權腑喔⑧覆喔佮箑喔權箟喔權箘喔涏笚喔掂箞喔斷副喔權箑喔曕箟喙€喔涏箛喔權笧喔脆箑喔ㄠ俯 (喔權箞喔侧笖喔掂箖喔堗笚喔掂箞喔涏福喔班箑喔椸辅喙勦笚喔⑧箑喔｀覆喔曕腑喔權笝喔掂箟喔佮箛喔∴傅 Inferno 喙佮笡喔ム腑喔竵喔∴覆喙佮弗喙夃抚 喔｀腹喔涏箑喔ム箞喔∴釜喔о涪喔斷傅) 喙佮笗喙堗竵喙囙涪喔编竾喔勦竾喔勦抚喔侧浮喔勦复喔斷箑喔夃傅喔⑧笟喔勦浮喙€喔佮傅喙堗涪喔о竵喔编笟喔娻傅喔о复喔曕箒喔ム赴喔о复喔椸涪喔侧辅喔侧釜喔曕福喙屶箘喔о箟喔涪喔灌箞喔斷傅 喙€喔權阜喙夃腑喔覆喙勦浮喙堗箘喔斷箟喙€喔傕箟喔侧箖喔堗竾喙堗覆喔� 喔椸傅喙堗腑喙堗覆喔權箘喔涏竵喙囙箖喔娻箞喔о箞喔侧笀喔班箑喔傕箟喔侧箖喔堗斧喔∴笖 喙佮笗喙堗竵喙囙箑喔涏箛喔權箑喔｀阜喙堗腑喔囙釜喔權父喔佮箒喔ム赴喔椸赋喙冟斧喙夃笗喔粪箞喔權笗喔侧笗喔粪箞喔權箖喔堗箘喔斷箟喙€喔浮喔� 喙€喔傕覆喙€喔傕傅喔⑧笝喙冟斧喙夃竸喔權箘喔∴箞喔堗笟喔о复喔椸涪喙屶浮喔侧涪喔编竾喔箞喔侧笝喔佮箛喔笝喔膏竵喔勦箞喔� 喙佮笗喙堗箘喔∴箞喔∴副喙堗笝喙冟笀喔о箞喔侧竸喔權笚喔掂箞喔∴傅喔勦抚喔侧浮喔｀腹喙夃笖喙夃覆喔權笝喔掂箟喔涪喔灌箞喙佮弗喙夃抚喔∴覆喔箞喔侧笝喔堗赴喔｀腹喙夃釜喔多竵喔⑧副喔囙箘喔�
喙€喔ム箞喔∴笝喔掂箟喙佮笟喙堗竾喔腑喔佮箑喔涏箛喔權釜喔侧浮喔炧覆喔｀箤喔� 喔炧覆喔｀箤喔椸箒喔｀竵喙€喔ム箞喔侧箑喔｀阜喙堗腑喔囙斧喔ム父喔∴笖喔赤腑喔⑧箞喔侧竾喔⑧箞喔權涪喙堗腑 喔炧覆喔｀箤喔椸釜喔竾喙佮弗喔班釜喔侧浮喙€喔ム箞喔侧箑喔｀阜喙堗腑喔囙抚喙堗覆喔弗喔膏浮喔傕覆喔о浮喔掂笚喔掂箞喔∴覆喔涪喙堗覆喔囙箘喔� 喙佮弗喔班笀喔班箑喔涏箛喔權箘喔涏箘喔斷箟喔涪喙堗覆喔囙箘喔｀箖喔權箑喔娻复喔囙笚喔む俯喔庎傅
Carlo Rovelli 喔⑧副喔囙竸喔囙箑喔傕傅喔⑧笝喔о复喔椸涪喔侧辅喔侧釜喔曕福喙屶竸喔о腑喔權笗喔编浮喔斷覆喔｀覆喔ㄠ覆喔笗喔｀箤喙勦笖喙夃竾喔斷竾喔侧浮 喙佮笗喙堗箘喔∴箞喙€喔浮喔粪腑喔權箑喔勦涪喙€喔椸箞喔侧箘喔� 喙€喔ム箞喔∴笝喔掂箟喔斷腹喙€喔浮喔粪腑喔權腑喔⑧覆喔佮箑喔權箟喔權箘喔涏笚喔掂箞喔斷副喔權箑喔曕箟喙€喔涏箛喔權笧喔脆箑喔ㄠ俯 (喔權箞喔侧笖喔掂箖喔堗笚喔掂箞喔涏福喔班箑喔椸辅喙勦笚喔⑧箑喔｀覆喔曕腑喔權笝喔掂箟喔佮箛喔∴傅 Inferno 喙佮笡喔ム腑喔竵喔∴覆喙佮弗喙夃抚 喔｀腹喔涏箑喔ム箞喔∴釜喔о涪喔斷傅) 喙佮笗喙堗竵喙囙涪喔编竾喔勦竾喔勦抚喔侧浮喔勦复喔斷箑喔夃傅喔⑧笟喔勦浮喙€喔佮傅喙堗涪喔о竵喔编笟喔娻傅喔о复喔曕箒喔ム赴喔о复喔椸涪喔侧辅喔侧釜喔曕福喙屶箘喔о箟喔涪喔灌箞喔斷傅 喙€喔權阜喙夃腑喔覆喙勦浮喙堗箘喔斷箟喙€喔傕箟喔侧箖喔堗竾喙堗覆喔� 喔椸傅喙堗腑喙堗覆喔權箘喔涏竵喙囙箖喔娻箞喔о箞喔侧笀喔班箑喔傕箟喔侧箖喔堗斧喔∴笖 喙佮笗喙堗竵喙囙箑喔涏箛喔權箑喔｀阜喙堗腑喔囙釜喔權父喔佮箒喔ム赴喔椸赋喙冟斧喙夃笗喔粪箞喔權笗喔侧笗喔粪箞喔權箖喔堗箘喔斷箟喙€喔浮喔� 喙€喔傕覆喙€喔傕傅喔⑧笝喙冟斧喙夃竸喔權箘喔∴箞喔堗笟喔о复喔椸涪喙屶浮喔侧涪喔编竾喔箞喔侧笝喔佮箛喔笝喔膏竵喔勦箞喔� 喙佮笗喙堗箘喔∴箞喔∴副喙堗笝喙冟笀喔о箞喔侧竸喔權笚喔掂箞喔∴傅喔勦抚喔侧浮喔｀腹喙夃笖喙夃覆喔權笝喔掂箟喔涪喔灌箞喙佮弗喙夃抚喔∴覆喔箞喔侧笝喔堗赴喔｀腹喙夃釜喔多竵喔⑧副喔囙箘喔�
December 23, 2023
Rovelli's most poetic work yet. I would recommend this little book to anyone. Sublime.
December 10, 2023
I鈥檝e gotta give this little book a round of applause, but with a pretty significant caveat.
It鈥檚 always good to keep in mind whether you are reading a book written by a physicist (or other scientist) or one written by a science writer, especially when the book is meant to explain difficult and controversial subject matter. Here Rovelli is writing as a physicist taking his own position on a controversial topic.
In writing for a general audience, he doesn鈥檛 have room to present the details of the controversy, and we are in no position to evaluate the arguments and find our own position anyway. We just get Rovelli鈥檚.
I鈥檓 not really faulting Rovelli for a one-sided presentation. I鈥檓 not sure what else he could do if he wants to write about the topic. He believes he has the correct position.
So what is the larger question behind Rovelli鈥檚 book, and his research?
It鈥檚 the vexing question of uniting general relativity, our best theory of gravity, with quantum theory, our best theory of microscopic reality. Rovelli is a proponent of loop quantum gravity, a true theory of quantum gravity.
I鈥檓 going to skip any details, ones I understand and the much greater number that I don鈥檛 understand. Rovelli doesn鈥檛 really present details here either. Part of the reason for that is no doubt that he鈥檚 avoiding difficult mathematics in a book for a general audience. In fact, there are no formulas or equations in the book.
The core of the book is his account of the fate of black holes. The idea that he sketches here is the result of an extended speculative conversation, in mathematical terms, that his colleague and partner in theory Hal Haggard initiated with him.
Rovelli takes us on an imaginative journey through the interior of a black hole, all the while casting our journey as analogous to Dante鈥檚 journey in The Divine Comedy. Just as Virgil was Dante鈥檚 guide through the Inferno, so relativity theory will be our guide through the black hole.
He dispels some common misconceptions about black holes involving time dilation and our subjective experience of time, what it means to 鈥渞everse time,鈥� and what the internal structure of a black hole might be like.
The culmination, again not explained in detail, is the 鈥渓eap鈥� that a black hole may take at the end of its lifetime, as its mass has slowly evaporated, a leap across quantum time and space that reverses the evolution of the black hole, a true time reversal that produces the black hole鈥檚 time reversed opposite, a white hole.
Just as the black hole had collapsed to a state from which nothing could escape, in this time reversal a white hole expands from the now decayed black hole to a state from which nothing can enter. A black hole permits nothing to escape, only to enter. A white hole permits nothing to enter, only to escape.
If Rovelli is right, and if black holes have lived out their lives and given birth to white holes, our universe contains innumerable white holes to be discovered. None have been discovered yet. They are of course small, their black hole parents having lost much of their mass over their lifetimes.
If there are enough white holes in the universe today that result from this process, we might well have at least a partial solution to the dark matter problem as a bonus.
This account of white holes is not filled with hopes of interstellar travel and the like. It is a physicist鈥檚 account of what happens beyond the observable boundaries of a black hole, according to loop quantum gravity.
Hence my caveat. Loop quantum gravity is certainly not accepted as verified, settled theory. Its application to the evolution of black holes likewise.
Rovelli is a participant in this exciting and fast-moving controversy about quantum gravity and its consequences, and he could produce (and does in his professional activity) the math and details. He doesn鈥檛 here, and for good reason.
So this is in turn an exciting book about what might emerge from that controversial field, and a bit of a mind-bender at that.
My applause is for his bringing a general audience into a very controversial and technical subject. My caveat is that general audiences, including me, are in no position to assess the position that Cavelli takes.
I really want to like Carlo Rovelli. He does this kind of stuff. If you haven鈥檛 read his Reality Isn鈥檛 What It Seems (on quantum gravity) and The Order of Time, I鈥檇 recommend those over this one, at least in order of reading. Both are, like this one, speculative and aimed at a general audience, but are in some sense more fundamental to their topics.
It鈥檚 always good to keep in mind whether you are reading a book written by a physicist (or other scientist) or one written by a science writer, especially when the book is meant to explain difficult and controversial subject matter. Here Rovelli is writing as a physicist taking his own position on a controversial topic.
In writing for a general audience, he doesn鈥檛 have room to present the details of the controversy, and we are in no position to evaluate the arguments and find our own position anyway. We just get Rovelli鈥檚.
I鈥檓 not really faulting Rovelli for a one-sided presentation. I鈥檓 not sure what else he could do if he wants to write about the topic. He believes he has the correct position.
So what is the larger question behind Rovelli鈥檚 book, and his research?
It鈥檚 the vexing question of uniting general relativity, our best theory of gravity, with quantum theory, our best theory of microscopic reality. Rovelli is a proponent of loop quantum gravity, a true theory of quantum gravity.
I鈥檓 going to skip any details, ones I understand and the much greater number that I don鈥檛 understand. Rovelli doesn鈥檛 really present details here either. Part of the reason for that is no doubt that he鈥檚 avoiding difficult mathematics in a book for a general audience. In fact, there are no formulas or equations in the book.
The core of the book is his account of the fate of black holes. The idea that he sketches here is the result of an extended speculative conversation, in mathematical terms, that his colleague and partner in theory Hal Haggard initiated with him.
Rovelli takes us on an imaginative journey through the interior of a black hole, all the while casting our journey as analogous to Dante鈥檚 journey in The Divine Comedy. Just as Virgil was Dante鈥檚 guide through the Inferno, so relativity theory will be our guide through the black hole.
He dispels some common misconceptions about black holes involving time dilation and our subjective experience of time, what it means to 鈥渞everse time,鈥� and what the internal structure of a black hole might be like.
The culmination, again not explained in detail, is the 鈥渓eap鈥� that a black hole may take at the end of its lifetime, as its mass has slowly evaporated, a leap across quantum time and space that reverses the evolution of the black hole, a true time reversal that produces the black hole鈥檚 time reversed opposite, a white hole.
Just as the black hole had collapsed to a state from which nothing could escape, in this time reversal a white hole expands from the now decayed black hole to a state from which nothing can enter. A black hole permits nothing to escape, only to enter. A white hole permits nothing to enter, only to escape.
If Rovelli is right, and if black holes have lived out their lives and given birth to white holes, our universe contains innumerable white holes to be discovered. None have been discovered yet. They are of course small, their black hole parents having lost much of their mass over their lifetimes.
If there are enough white holes in the universe today that result from this process, we might well have at least a partial solution to the dark matter problem as a bonus.
This account of white holes is not filled with hopes of interstellar travel and the like. It is a physicist鈥檚 account of what happens beyond the observable boundaries of a black hole, according to loop quantum gravity.
Hence my caveat. Loop quantum gravity is certainly not accepted as verified, settled theory. Its application to the evolution of black holes likewise.
Rovelli is a participant in this exciting and fast-moving controversy about quantum gravity and its consequences, and he could produce (and does in his professional activity) the math and details. He doesn鈥檛 here, and for good reason.
So this is in turn an exciting book about what might emerge from that controversial field, and a bit of a mind-bender at that.
My applause is for his bringing a general audience into a very controversial and technical subject. My caveat is that general audiences, including me, are in no position to assess the position that Cavelli takes.
I really want to like Carlo Rovelli. He does this kind of stuff. If you haven鈥檛 read his Reality Isn鈥檛 What It Seems (on quantum gravity) and The Order of Time, I鈥檇 recommend those over this one, at least in order of reading. Both are, like this one, speculative and aimed at a general audience, but are in some sense more fundamental to their topics.
March 7, 2024
脡 um livro, uma pequena viagem sobre o conhecimento humano. Uma curta viagem em que Carlo Roveli nos guia com a eleg芒ncia e o prazer de quem 茅 anfitri茫o de um tema que conhece como a palma da sua m茫o. Nesta 鈥減equena鈥� viagem tra莽a um rumo e com poesia descreve muitas ideias, algumas bem profundas e que poder茫o passar despercebidas a leitores mais apressados ou distra铆dos. 脡 um livro para se ler com aten莽茫o com muito nas entrelinhas, um livro que relata a viagem de uma nuvem de H茅lio que se condensa numa estrela, se condensa ainda mais num buraco negro e renasce devolvendo toda a sua informa莽茫o ao universo sob a forma de um 鈥渂uraco branco鈥�. As estrelas n茫o morrem, e tal como 鈥淕andalf鈥� de Tolkien, surgem no horizonte para retomar o seu papel na hist贸ria e no universo.
January 19, 2024
I buchi neri non sono un argomento sulla bocca di molti. Con l'apprendimento, potremmo scoprire che sono pieni di profondit脿 e dimensione e si muovono in modo musicale. Il buco bianco 猫 l'opposto. Esiste come una tavolozza vuota. E inverte il tempo stesso e ci fa dubitare che esista davvero. che inverte il tempo. 脠 attraverso il processo del lavoro che ci avviciniamo sempre di pi霉 alla verit脿. Troviamo queste verit脿 e la vita ed 猫 la matematica della bellezza.
鈥淔are scienza 猫 una successione di delusioni, cose che non funzionano, idee sbagliate, esperimenti che non riescono, conti che non tornano. di tanto in tanto punteggiata da momenti di gioia.鈥�
鈥擟arlo Rovelli
Riferendosi al pensiero milesiano, 鈥渋l discepolo non 猫 pi霉 obbligato a rispettare e condividere le idee del maestro ma 猫 libero di costruire su quelle idee senza aver paura di scartare o criticare la parte che pu貌 essere migliorata鈥�. Rovelli la definisce 鈥渓鈥檃lba di una nuova era." In un certo senso afferma che lo studente 猫 diventato il Maestro e la creazione 猫 possibile.
鈥淔are scienza 猫 una successione di delusioni, cose che non funzionano, idee sbagliate, esperimenti che non riescono, conti che non tornano. di tanto in tanto punteggiata da momenti di gioia.鈥�
鈥擟arlo Rovelli
Riferendosi al pensiero milesiano, 鈥渋l discepolo non 猫 pi霉 obbligato a rispettare e condividere le idee del maestro ma 猫 libero di costruire su quelle idee senza aver paura di scartare o criticare la parte che pu貌 essere migliorata鈥�. Rovelli la definisce 鈥渓鈥檃lba di una nuova era." In un certo senso afferma che lo studente 猫 diventato il Maestro e la creazione 猫 possibile.
April 27, 2023
Anche se probabilmente ho capito un terzo del libro (e quando dico un terzo sono generoso nei miei confronti...), non sono riuscito a staccarmi dalla lettura dalla prima all'ultima pagina: Carlo Rovelli, come sempre, 猫 riuscito a rendere piacevole e affascinante una materia ostica come la fisica spaziando con eleganza da Dante ai misteri dello spazio e del tempo.
I buchi bianchi sono i "fratelli minori" dei buchi neri che riempiono l'universo e in questo breve saggio vengono raccontati come se fossero una ricerca in corso, una scoperta ancora da fare che - probabilmente - ci aiuter脿 a capire un po' meglio concetti come il trascorrere del tempo e le diverse prospettive con cui possiamo guardare il passato e il futuro.
A mio avviso 猫 un libro adatto a tutti coloro che, come me, sono "ignoranti" del tema perch茅 cos矛 diventa ancora pi霉 facile smarrirsi in un viaggio a tratti fantascientifico, alla ricerca di un qualcosa che forse non c'猫, spinti solo dal desiderio di andare sempre un po' pi霉 in l脿.
I buchi bianchi sono i "fratelli minori" dei buchi neri che riempiono l'universo e in questo breve saggio vengono raccontati come se fossero una ricerca in corso, una scoperta ancora da fare che - probabilmente - ci aiuter脿 a capire un po' meglio concetti come il trascorrere del tempo e le diverse prospettive con cui possiamo guardare il passato e il futuro.
A mio avviso 猫 un libro adatto a tutti coloro che, come me, sono "ignoranti" del tema perch茅 cos矛 diventa ancora pi霉 facile smarrirsi in un viaggio a tratti fantascientifico, alla ricerca di un qualcosa che forse non c'猫, spinti solo dal desiderio di andare sempre un po' pi霉 in l脿.
January 9, 2025
Sempre chiaro nell'esposizione, mi fa sentire arricchita interiormente.
March 3, 2023
In modo piacevolmente informale Rovelli cerca di metterci a parte della sua teoria sui buchi bianchi, corpi celesti per ora puramente teorici dal funzionamento molto complicato. Pi霉 che i buchi bianchi, sui quali probabilmente a fine lettura un po' tutti avranno dei dubbi (a maggior ragione chi come me di fisica non sa nulla), a colpire e a rimanere impresse sono le sue virate sulla storia della scienza e perch茅 no, anche sulla filosofia della scienza. Dopotutto come ben spiega nel libro cercare di trovare il funzionamento di qualcosa che per definizione non 猫 n茅 misurabile n茅 avvistabile la maggiore difficolt脿 猫 riuscire a capire cosa di quello che pensiamo di sapere della realt脿 猫 da mettere in discussione.
Il libro, tutto inframezzato di citazioni dantesche, sembra prima di tutto voler fissare le riflessioni dell'autore riguardo ai concetti di tempo e di realt脿, e nella terza parte, la pi霉 bella del libro, partendo dal paradosso della perdita di informazione della materia dentro la stella caduta, che per Rovelli si risolverebbe appunto postulando il buco bianco, la riflessione si sposta sulla percezione del tempo in una realt脿 che nella quarta dimensione si muove solo in un senso, pi霉 che in avanti, in discesa, come spiega il bellissimo esempio finale delle due vasche. La fisica quantistica ci costringe a ammettere che il tempo potrebbe non avere una direzione propria, ma 猫 la disposizione non equilibrata della materia nel passato che determina il mutamento, e quindi l'esistenza stessa del futuro stato della materia (alfine identico al primo passo?): l'esistenza del mutamento crea il presente? Ricordiamo il passato e non conosciamo il futuro solo perch茅 nel passato c'era pi霉 disordine, e quindi tracce e indizi dello stesso? Ed 猫 unicamente questo il motivo per cui l'effetto segue la causa?
A malincuore lascio le risposte a chi 猫 in grado di trovarle. Nel libro emerge sopra tutto la figura di scienziato umanista, dedito non solo al pensiero scientifico, ma devoto anche al caro vecchio scassato pensiero analogico, noto da sempre agli orientali, coltivato in occidente in principio dagli artisti. Per spingerci oltre ci貌 che sappiamo dobbiamo abbandonare una quantit脿 sconosciuta di regole e "certezze", per provare a ragionare modularmente, immaginificamente. Provare ad abbandonare le nozioni di causa e di effetto, per scoprire relazioni recondite in ci貌 che ci circonda.
Il libro, tutto inframezzato di citazioni dantesche, sembra prima di tutto voler fissare le riflessioni dell'autore riguardo ai concetti di tempo e di realt脿, e nella terza parte, la pi霉 bella del libro, partendo dal paradosso della perdita di informazione della materia dentro la stella caduta, che per Rovelli si risolverebbe appunto postulando il buco bianco, la riflessione si sposta sulla percezione del tempo in una realt脿 che nella quarta dimensione si muove solo in un senso, pi霉 che in avanti, in discesa, come spiega il bellissimo esempio finale delle due vasche. La fisica quantistica ci costringe a ammettere che il tempo potrebbe non avere una direzione propria, ma 猫 la disposizione non equilibrata della materia nel passato che determina il mutamento, e quindi l'esistenza stessa del futuro stato della materia (alfine identico al primo passo?): l'esistenza del mutamento crea il presente? Ricordiamo il passato e non conosciamo il futuro solo perch茅 nel passato c'era pi霉 disordine, e quindi tracce e indizi dello stesso? Ed 猫 unicamente questo il motivo per cui l'effetto segue la causa?
A malincuore lascio le risposte a chi 猫 in grado di trovarle. Nel libro emerge sopra tutto la figura di scienziato umanista, dedito non solo al pensiero scientifico, ma devoto anche al caro vecchio scassato pensiero analogico, noto da sempre agli orientali, coltivato in occidente in principio dagli artisti. Per spingerci oltre ci貌 che sappiamo dobbiamo abbandonare una quantit脿 sconosciuta di regole e "certezze", per provare a ragionare modularmente, immaginificamente. Provare ad abbandonare le nozioni di causa e di effetto, per scoprire relazioni recondite in ci貌 che ci circonda.
March 10, 2024
I bought this book yesterday evening*. I started it this morning and finished it just now. And that's my usual experience with Rovelli: the lines between astrophysics, poetry and philosophy blend into a beautiful unified whole.
Rovelli aims to write books that both a layperson and an astrophysicist can understand and from which they can both get new ideas. His toughest audience is university students, likely due to having learned just enough to feel you're being condescended to without being confident enough to realise technical terms are useful for preciseness and efficiency, but not necessarily the best way to communicate new concepts. I feel their pain, but I know nothing, so I was delighted.
You don't have to have read Dante's to understand this book, but it's nice if you have. Rovelli uses it mostly as a poetic device which I feel enriches the text in ways you wouldn't expect from an essay about quantum physics.
I don't know if I understood what Rovelli explained in any way that matters. I got a feel for it. Something about the fundamental nature of the universe clicked within me. I certainly don't understand it well enough to explain it to anyone else. I will re-read this one.
*If I had known this book was already out I would have bought it earlier, but following an author on 欧宝娱乐 does not, in fact, alert you when that author has a new book coming out. I appreciate the alerts about the blogs, but I would very much like to know when an author has an upcoming release. Please 欧宝娱乐 employees, and thank you.
Rovelli aims to write books that both a layperson and an astrophysicist can understand and from which they can both get new ideas. His toughest audience is university students, likely due to having learned just enough to feel you're being condescended to without being confident enough to realise technical terms are useful for preciseness and efficiency, but not necessarily the best way to communicate new concepts. I feel their pain, but I know nothing, so I was delighted.
You don't have to have read Dante's to understand this book, but it's nice if you have. Rovelli uses it mostly as a poetic device which I feel enriches the text in ways you wouldn't expect from an essay about quantum physics.
I don't know if I understood what Rovelli explained in any way that matters. I got a feel for it. Something about the fundamental nature of the universe clicked within me. I certainly don't understand it well enough to explain it to anyone else. I will re-read this one.
*If I had known this book was already out I would have bought it earlier, but following an author on 欧宝娱乐 does not, in fact, alert you when that author has a new book coming out. I appreciate the alerts about the blogs, but I would very much like to know when an author has an upcoming release. Please 欧宝娱乐 employees, and thank you.
February 15, 2024
Rovelli makes science digestible.
Before this book, I hadn't known anything about black holes. Now I know they are full of depth and dimension, to such incredibly immensity with movement, with music. The white hole is the opposite. It is void of anything. So much so that it reverses time. And though we don't know if they exist or not, Rovelli makes note of how fascinating it is to ride the rollercoaster of the scientific method. Through trials and errors do we glide with him in finding the world a bit more truer through the hard facts presented.
It's through the process of the work that we get closer and closer to the truth. Truth in life. Truth in beauty.
"饾樃饾槮 饾槱饾槩饾樂饾槮 饾槩饾槫饾槫饾槮饾槾饾槾 饾槹饾槸饾槶饾樅 饾樀饾槹 饾槺饾槮饾槼饾槾饾槺饾槮饾槫饾樀饾槳饾樂饾槮饾槾. 饾槼饾槮饾槩饾槶饾槳饾樀饾樅 饾槳饾槾 饾槺饾槮饾槼饾槱饾槩饾槺饾槾 饾槸饾槹饾樀饾槱饾槳饾槸饾槰 饾槹饾樀饾槱饾槮饾槼 饾樀饾槱饾槩饾槸 饾槺饾槮饾槼饾槾饾槺饾槮饾槫饾樀饾槳饾樂饾槮饾槾. 饾樀饾槱饾槮饾槼饾槮 饾槳饾槾 饾槸饾槹 饾槩饾槪饾槾饾槹饾槶饾樁饾樀饾槮. 饾樃饾槮 饾槩饾槼饾槮 饾槶饾槳饾槷饾槳饾樀饾槮饾槬, 饾槳饾槷饾槺饾槮饾槼饾槷饾槩饾槸饾槮饾槸饾樀. 饾槩饾槸饾槬 饾槺饾槼饾槮饾槫饾槳饾槾饾槮饾槶饾樅 饾槯饾槹饾槼 饾樀饾槱饾槳饾槾 饾槼饾槮饾槩饾槾饾槹饾槸, 饾樀饾槹 饾槶饾槳饾樂饾槮, 饾樀饾槹 饾槪饾槮, 饾槩饾槾 饾樃饾槮 饾槬饾槹, 饾槳饾槾 饾槾饾槹 饾槶饾槳饾槰饾槱饾樀 饾槩饾槸饾槬 饾槾饾樃饾槮饾槮饾樀..."
And so my perspective, not just on black hole and white holes, but life itself has shifted. I have perspective. And others have perspectives of me. I am only meant to circumnavigate in and around perceptions.
And so, I see a bit clearer. See a bit more. Wide shot expanded, a truer 1.85:1.
December 20, 2023
Little repetitive here and there but it was okey? It just bored me a bit near the end it wasn鈥檛 as exciting as I鈥檇 hoped and the writing style was inconsistent.
October 25, 2024
I adore Rovelli. He can mix quantum physics with Dante and Rilke. One chapter is almost formatted in stanzas like the Divine Comedy (which, by the way all 3-parts end with references to stars). Do I get it all, have I wrapped my head completely around what he's suggesting here. No. The closer I get to this idea, the slower my brain works. So, all is how it should be.
November 14, 2023
Gave me an existential crisis or two. Time鈥檚 not real, space is only kinda real, I鈥檓 probably not real but it鈥檚 fine.
Also we get it. You鈥檝e read Divine Comedy. Don鈥檛 quote it on every damn page.
Also we get it. You鈥檝e read Divine Comedy. Don鈥檛 quote it on every damn page.
February 6, 2024
4,5*
Mus铆m sa prizna钮, 啪e fyzika je pre m艌a osobne nesmierne 钮a啪k谩 na pochop. Sem tam si s 艌ou zaflirtujem, ale v盲膷拧inou to skon膷铆 fiaskom..
Carlo Rovelli vo mne so svojou knihou Biele diery prebudil detsk煤 zvedavos钮 a priam a啪 ohromuj煤cu fascin谩ciu. Vedou, vesm铆rom, 啪ivotom. Prv媒kr谩t m谩m pocit, 啪e tomu trochu (laicky) rozumiem. Teda - zopakovala by som to po 艌om asi 钮a啪ko, ale m谩m na 膷om stava钮. Nap暮艌a ma to nesmiernym optimizmom :)
Kniha sa zaober谩 膷iernymi a bielymi dierami vo vesm铆re. Autor vysvet木uje ich existenciu aj sprievodn茅 javy ve木mi jednoduch媒m jazykom. Okrem vedeck媒ch poznatkov sem-tam pon煤ka aj svoje my拧lienky oh木adom vedy a 啪ivota, 膷o vn铆mam ako prijemn茅 obohatenie.
T媒m, 啪e m谩 kniha len 140 str谩n nepojme cel煤 problematiku do h暮bky a hoci m谩m e拧te desiatky ot谩zok, tento form谩t mi pr铆de dokonale vyhovuj煤ci. Pokojne by som na slovenskom kni啪nom trhu prijala aj viac tak媒chto krat拧铆ch kn铆h osvet木uj煤cich dostupn媒m jazykom nejak媒 jav.
Za m艌a ve木k茅 odpor煤膷anie v拧etk媒m, ktor铆 s煤 fascinovani vesm铆rom, pohr谩vaj煤 sa s fyzikou, zauj铆ma ich svet okolo alebo proste len miluj煤 popul谩rno-n谩u膷n煤 literat煤ru. <3
Mus铆m sa prizna钮, 啪e fyzika je pre m艌a osobne nesmierne 钮a啪k谩 na pochop. Sem tam si s 艌ou zaflirtujem, ale v盲膷拧inou to skon膷铆 fiaskom..
Carlo Rovelli vo mne so svojou knihou Biele diery prebudil detsk煤 zvedavos钮 a priam a啪 ohromuj煤cu fascin谩ciu. Vedou, vesm铆rom, 啪ivotom. Prv媒kr谩t m谩m pocit, 啪e tomu trochu (laicky) rozumiem. Teda - zopakovala by som to po 艌om asi 钮a啪ko, ale m谩m na 膷om stava钮. Nap暮艌a ma to nesmiernym optimizmom :)
Kniha sa zaober谩 膷iernymi a bielymi dierami vo vesm铆re. Autor vysvet木uje ich existenciu aj sprievodn茅 javy ve木mi jednoduch媒m jazykom. Okrem vedeck媒ch poznatkov sem-tam pon煤ka aj svoje my拧lienky oh木adom vedy a 啪ivota, 膷o vn铆mam ako prijemn茅 obohatenie.
T媒m, 啪e m谩 kniha len 140 str谩n nepojme cel煤 problematiku do h暮bky a hoci m谩m e拧te desiatky ot谩zok, tento form谩t mi pr铆de dokonale vyhovuj煤ci. Pokojne by som na slovenskom kni啪nom trhu prijala aj viac tak媒chto krat拧铆ch kn铆h osvet木uj煤cich dostupn媒m jazykom nejak媒 jav.
Za m艌a ve木k茅 odpor煤膷anie v拧etk媒m, ktor铆 s煤 fascinovani vesm铆rom, pohr谩vaj煤 sa s fyzikou, zauj铆ma ich svet okolo alebo proste len miluj煤 popul谩rno-n谩u膷n煤 literat煤ru. <3
June 23, 2024
This is a very interesting book, but is it a work of fact or of fiction? I ask because no one has ever located a White Hole and this is perhaps not surprising because a White Hole in the sky is like a floating speck of dust. Perhaps they are all around us but no one knows how to detect one because unlike a speck of dust, White Holes do not have electrical features and so don't interact with light. White Holes can't be seen and have weak gravitational force.
White Holes come into being when a Black Hole evaporates, but this is only a theory as they say, even if it is a compelling idea, and some evidence is required.
The book was written, at least partially, in Verona where Dante wrote The Divine Comedy, and so there are many references to this great work of poetry in these pages.
The one thing that I don't understand about this book is what would cause a Black Hole to 'bounce' or 'rebound' to create the White Hole. In order to bounce, something has to be hit, perhaps the star at the bottom of the Black Hole? Because that's what is at the bottom / the end of the Black Hole, the star that collapsed to create the Black Hole.
White Holes come into being when a Black Hole evaporates, but this is only a theory as they say, even if it is a compelling idea, and some evidence is required.
The book was written, at least partially, in Verona where Dante wrote The Divine Comedy, and so there are many references to this great work of poetry in these pages.
The one thing that I don't understand about this book is what would cause a Black Hole to 'bounce' or 'rebound' to create the White Hole. In order to bounce, something has to be hit, perhaps the star at the bottom of the Black Hole? Because that's what is at the bottom / the end of the Black Hole, the star that collapsed to create the Black Hole.
March 24, 2023
Sono rimasta piacevolmente sorpresa da Carlo Rovelli, di cui non avevo mai letto nulla, ma di cui sicuramente legger貌 altro. Buchi bianchi 猫 un libricino che racconta (con un tono quasi favolistico) una teoria sull鈥檈sistenza dei buchi bianchi nell鈥檜niverso. La scrittura non 猫 semplicissima, ma comunque comprensibile anche per chi, come me, non sa nulla di fisica, ma 猫 affascinato/a dai misteri dell鈥檜niverso. Leggendo questo libro, ho percepito Carlo Rovelli molto vicino a me, quasi come se uno zio mi stesse raccontando storie grandi e affascinanti. Mi sono anche sentita sopraffatta, nella parte finale, pensando all鈥檌mmensit脿 dell鈥檜niverso, che conosciamo cos矛 poco, e a quanto piccoli siamo noi qui sulla Terra.
Mi lascia con molte domande questo libro.
Esisteranno davvero i buchi bianchi? Ci sar脿 stato un universo primordiale prima del Big Bang? Cosa c鈥櫭� realmente dentro i buchi neri? Cosa succeder脿 quando l鈥檜niverso finir脿 di espandersi? Finir脿 di espandersi?
Mi lascia con molte domande questo libro.
Esisteranno davvero i buchi bianchi? Ci sar脿 stato un universo primordiale prima del Big Bang? Cosa c鈥櫭� realmente dentro i buchi neri? Cosa succeder脿 quando l鈥檜niverso finir脿 di espandersi? Finir脿 di espandersi?
August 28, 2024
Interesting and easy to understand. The visual aids are great
July 26, 2024
This is probably one of my favorite books in a long time. For a topic that is typically challenging to grasp, it was written in a manner that is digestible to anyone interested in the cosmos. I鈥檝e always been intrigued by black holes and their surrounding mysteries, and this book made it possible to visualize and journey through this phenomenon. This work also read like a poem to the cosmos or as Rovelli aptly described it, his song to white holes.
April 22, 2024
"Making an analogy involves taking an aspect of a concept and re-using it in another context, preserving something of its original meaning while letting something else go, in such a way that the resulting combination produces new and effective meaning. This is how the best science works."
You either like your cutting edge physics with more Dante Alighieri, in which case you will love Rovelli, or less-to-no Dante, in which case he is unlikely to be your cup of prosecco. My favourite part of this slim, idea-packed volume was probably when Rovelli takes to task those who criticise him for eschewing technical terminology in his books. Non-physicists are just glad to have things explained in terms they can follow, and experts already know the technical content - the annoyed, he asserts, are largely physics students keen to practice their newly learnt ways of thinking. For them, he includes a footnote in which even this non-physicist could detect the thumbed nose.
Rovelli's books don't just explain complex things in simple terms, they capture some of the beauty and wonder of knowledge (or speculation) that drives the field. I love that Rovelli - so unlike any other physicist I can think of - embraces doubt. Is his theory of White Holes true? He really has no idea, he tells us, but he really *wants* it to be because it is so lovely.
For Rovelli, math is poetry. And even for those of us for whom well, poetry is poetry, this love makes his passions feel worth investing an hour or two in.
You either like your cutting edge physics with more Dante Alighieri, in which case you will love Rovelli, or less-to-no Dante, in which case he is unlikely to be your cup of prosecco. My favourite part of this slim, idea-packed volume was probably when Rovelli takes to task those who criticise him for eschewing technical terminology in his books. Non-physicists are just glad to have things explained in terms they can follow, and experts already know the technical content - the annoyed, he asserts, are largely physics students keen to practice their newly learnt ways of thinking. For them, he includes a footnote in which even this non-physicist could detect the thumbed nose.
Rovelli's books don't just explain complex things in simple terms, they capture some of the beauty and wonder of knowledge (or speculation) that drives the field. I love that Rovelli - so unlike any other physicist I can think of - embraces doubt. Is his theory of White Holes true? He really has no idea, he tells us, but he really *wants* it to be because it is so lovely.
For Rovelli, math is poetry. And even for those of us for whom well, poetry is poetry, this love makes his passions feel worth investing an hour or two in.
Read
June 13, 2024I鈥檓 not sure that I fully comprehended everything in this book so I鈥檓 not leaving a rating. However in white holes the author makes the argument for the existence of white holes in space as an exact opposite to black holes so if something can go into a black hole but not come out, then something can go out of a white hole but not come in.
I don鈥檛 know, the author uses better analogies through the book to represent the phenomenon, but a lot of it still went over my head. Including the constant quoting of Dante鈥檚 inferno to help illustrate the comparisons, which I more often than not didn鈥檛 see the relevance.
I don鈥檛 know, the author uses better analogies through the book to represent the phenomenon, but a lot of it still went over my head. Including the constant quoting of Dante鈥檚 inferno to help illustrate the comparisons, which I more often than not didn鈥檛 see the relevance.
September 15, 2024
I think my problem with this book can best be summed up by the Moby Dick quote at the end. Whenever we feel that "damp, drizzly November in our soul, then it is high time to get to sea, to quietly board a ship that takes us to the world". This line, contextually, does not have the vibe that Rovelli believes it does. It's a pretty line, it sounds so very poetic, but he has emptied it. Same with Dante's Inferno, quotes from which infest every page but add nothing other than to show us that Rovelli has read it - well done him. Basically maybe stick with the holes, my guy
January 2, 2024
I love Carlo Rovelli. All of his books describe his research and asks thought-provoking questions with beautiful language and analogies. His physics is romantic, always pairing it with elements of philosophy, art, and religion. White Holes didn鈥檛 fail to meet that again. Its a curious theory that I hope to understand it more thoroughly with math in the future. But until then, this book scratched that itch of discovering another theory on the wonders in our sky!!
April 13, 2023
Quasi perfetto, non fosse per alcuni paragrafi che sembrano letteralmente appunti gettati l矛.
Trasmette veramente la voglia di scoprire il magnifico mondo dei quanti e la loro interazione con il nostro universo macroscopico.
Finalmente un racconto in grado di descrivere per bene cosa succede nelle vicinanze e all'interno di un buco nero.
I buchi bianchi rimangono qualcosa di esotico, cos矛 come altre descrizioni fornite da Rovelli; questo perch猫 non si hanno ancora tutte le risposte, non gliene si pu貌 fare certo una colpa.
Rimane l'entusiasmo trasmesso dall'autore verso questa materia.
Trasmette veramente la voglia di scoprire il magnifico mondo dei quanti e la loro interazione con il nostro universo macroscopico.
Finalmente un racconto in grado di descrivere per bene cosa succede nelle vicinanze e all'interno di un buco nero.
I buchi bianchi rimangono qualcosa di esotico, cos矛 come altre descrizioni fornite da Rovelli; questo perch猫 non si hanno ancora tutte le risposte, non gliene si pu貌 fare certo una colpa.
Rimane l'entusiasmo trasmesso dall'autore verso questa materia.
March 19, 2024
Sono conscia di capire circa il 30% di ci貌 che 猫 scritto in questi saggi di fisica, ma che magia avvicinarsi anche solo un poco all鈥檌nsondabile. Rovelli mi 猫 amico nell鈥檜sare parole e metafore che posso comprendere, e cos矛 illuminare un poco un mondo che mi era sempre sembrato precluso.
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