Crato, Nuno (Author)
Tirapicos, Luís (Author)
Integrado nas comemorações do centenário do eclipse de 29 de Maio de 1919 este livro bilingue (português/inglês), editado pelo Clube do Colecionador dos Correios, centra a sua narrativa nos acontecimentos históricos que levaram à primeira confirmação da relatividade geral de Albert Einstein, através de um programa de observações dedicadas. Como é habitual nesta colecção o livro inclui a edição filatélica alusiva ao tema. As duas expedições britânicas, organizadas à ilha do Príncipe – na época sob administração portuguesa – e a Sobral, no Brasil, seriam bem-sucedidas e a divulgação dos resultados, em Novembro de 1919, tornaria a figura de Einstein conhecida em todo o mundo. Em particular, é abordado nesta obra o papel dos astrónomos, das autoridades e de várias figuras locais, quer em Portugal continental e no Príncipe, quer no Brasil, no necessário apoio técnico e logístico, crucial no sucesso das expedições inglesas. Os autores, Nuno Crato e Luís Tirapicos, começam por explicar o contexto histórico e científico e os objetivos e técnicas envolvidas na observação do eclipse de 1919. Prosseguem com a descrição detalhada dos preparativos e da execução das expedições à ilha do Príncipe e a Sobral. Por fim, são discutidas as reações aos resultados obtidos pelos astrónomos britânicos e posteriores confirmações experimentais da relatividade generalizada, incluindo a primeira detecção de ondas gravitacionais em Setembro de 2015. [English Translation: As part of the commemorations of the centenary of the eclipse of May 29, 1919, this bilingual (Portuguese/English) book, published by the Correios Collector's Club, centers its narrative on the historical events that led to the first confirmation of Albert Einstein's general relativity, through a dedicated observation program. As usual in this collection, the book includes a philatelic edition alluding to the theme. The two British expeditions, organized to the island of Príncipe – at the time under Portuguese administration – and to Sobral, in Brazil, would be successful and the publication of the results, in November 1919, would make the figure of Einstein known throughout the world. In particular, this work addresses the role of astronomers, authorities and various local figures, whether in mainland Portugal and Príncipe, or in Brazil, in the necessary technical and logistical support, crucial to the success of the English expeditions. The authors, Nuno Crato and Luís Tirapicos, begin by explaining the historical and scientific context and the objectives and techniques involved in observing the 1919 eclipse. They proceed with a detailed description of the preparations and execution of the expeditions to the island of Príncipe and Sobral. Finally, reactions to the results obtained by British astronomers and subsequent experimental confirmations of general relativity, including the first detection of gravitational waves in September 2015, are discussed.]
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