Abraham Loeb

C'est fin 2017 que des chercheurs de l'observatoire Haleakala, dans les îles d'Hawaï, détectent un étrange objet qui traverse notre système solaire à une vitesse si élevée qu'il ne peut provenir que d'une distante étoile. L'objet, baptisé 'Oumuamua, ne dégage aucune traînée de gaz ou de poussières lorsqu'il passe à proximité du Soleil. Pour l'astrophysicien Avi Loeb, en raison de sa forme et de sa trajectoire insolites, la seule explication logique est qu'il s'agit d'un engin artificiel construit par une civilisation extraterrestre. Cette hypothèse d'Avi Loeb fait couler beaucoup d'encre, et les implications qui en découlent pour l'avenir de la science, des religions et de l'espèce humaine sont considérables. Extraterrestre est un livre aussi généreux que vertigineux, au croisement de la science et de la philosophie, qui nous enjoint à remettre en question nos idées reçues et à porter un regard critique sur l'univers qui nous entoure et les objets qu'il recèle, aussi étranges soient-ils...

le premier signe d'une vie intelligente

Extraterrestre

Steven R. Furlanetto

This book provides a comprehensive, self-contained introduction to one of the most exciting frontiers in astrophysics today: the quest to understand how the oldest and most distant galaxies in our universe first formed. Until now, most research on this question has been theoretical, but the next few years will bring about a new generation of large telescopes that promise to supply a flood of data about the infant universe during its first billion years after the big bang. This book bridges the gap between theory and observation. It is an invaluable reference for students and researchers on early galaxies. The First Galaxies in the Universe starts from basic physical principles before moving on to more advanced material. Topics include the gravitational growth of structure, the intergalactic medium, the formation and evolution of the first stars and black holes, feedback and galaxy evolution, reionization, 21-cm cosmology, and more. Provides a comprehensive introduction to this exciting frontier in astrophysics Begins from first principles Covers advanced topics such as the first stars and 21-cm cosmology Prepares students for research using the next generation of large telescopes Discusses many open questions to be explored in the coming decade

The First Galaxies in the Universe

Andrea Ferrara

Richard S. Ellis

The exploration of the first billion years of the history of the Universe represents one of the great challenges of contemporary astrophysics. During this time, the first structures start to form the first stars, galaxies, and possibly also soon the first quasars. At the same time, light comes to the dark, neutral Universe. This book contains the worked out lectures given at the 36th Saas-Fee Advanced Course "First Light in the Universe" by three eminent scientists in the field.

Saas-Fee Advanced Course 36. Swiss Society for Astrophysics and Astronomy

First Light in the Universe

Manasvi Lingam

Are we alone in the universe? It is a captivating question, but one that historically eluded proper scientific investigation. The new discipline of astrobiology changes the game, introducing rigor to the quest for extraterrestrial life. Life in the Cosmos surveys the field, showing how cutting-edge research is closing in on the answers "out there."

Abraham Loeb

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