La galassia vivente
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La galassia vivente: Vincitori e vinti nella Via Lattea

La galassia vivente: Vincitori e vinti nella Via Lattea

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About the Book

Il libro descrive la possibile distribuzione della vita nella Via Lattea. Tramite l’equazione di Drake individua i parametri per calcolare in numero di civiltà intelligenti con cui potremmo comunicare e il numero complessivo di forme di vita presenti a tutti i livelli. L’equazione di Drake citata è composta da sette fattori molto difficili da definire; tuttavia, con un sofisticato metodo probabilistico il testo approfondisce l’equazione ampliandola a 50 fattori e discutendo ciascuno di essi. Per questa via ripercorre, quantificandola in termini probabilistici, l’intera narrazione della nostra galassia. Questo tuttavia, non è solo un libro scientifico. Vuole essere soprattutto un racconto di una serie di avvenimenti, precosmici prima, preistorici poi e infine futuribili, popolato da scenari e protagonisti possenti la cui esistenza è, questa sì, basata su modelli scientifici ma che, insieme, rappresentano il dramma della vita che nasce e s’impone o muore e scompare. Un racconto di possibilità, tentativi, sconfitte e riscatti, sulla scala non dell’uomo, ma delle civiltà galattiche.

Table of Contents:
INTRODUZIONE.- Dove sono tutti quanti?.- Le fasi e le sfide.- PARTE I - I PARAMETRI ASTRONOMICI Ns, np e fs.-1 Drake: la numerosità stellare del disco galattico per stelle di classe spettrale K, G ED F.-2 Drake: numero pianeti per stella, adatti alla vita nella zona abitabile (classe spettrale F, G E K).- 3 Drake: frazione di pianeti stabili per 7 Ga (durata della popolazione stellare).-PARTE II - I PARAMETRI BIOLOGICI DI DRAKE: fl e fi.- 4 Drake: il passaggio dal non vivente al vivente.- 5 Drake: la probabilità di vita intelligente.- Macrointervallo A: Il passaggio cruciale; l’insorgenza della cellula eucariotica.- Macrointervallo B: Il secondo passo; la nascita degli animali (i metazoi).- Macrointervallo C: La “soluzione” dell’intelligenza dedotta dalla definizione di Kardašëv, centrata sull’energia per individuo, e la sua nascita all’interno dei metazoi (il caso Homo).- La curva dell’ossigeno.- PARTE III- I PARAMETRI SOCIALI DI DRAKE: fc e fl.- 6 Drake: frazione di pianeti dove la vita decide di comunicare.- 7 Drake: frazione temporale della durata di una civiltà.- L’EQUAZIONE DI DRAKE COMPLETA.- Ancora il paradosso di Fermi (ma insomma, dove sono tutti quanti?).- VINCITORI E VINTI NELLA VIA LATTEA.- Identikit di due possibili specie aliene intelligenti.- EPILOGO LA PIETÀ DEL GHEPARDO.- APPENDICI.


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Product Details
  • ISBN-13: 9783031656538
  • Publisher: Springer International Publishing AG
  • Binding: Paperback
  • Language: Italian
  • Returnable: Y
  • Width: 155 mm
  • ISBN-10: 3031656539
  • Publisher Date: 05 Mar 2025
  • Height: 235 mm
  • No of Pages: 225
  • Sub Title: Vincitori e vinti nella Via Lattea


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