Alfonso X y su época

Breve historia de la carrera espacial es un repaso histórico de la astronáutica y de los múltiples esfuerzos del ser humano por conocer qué hay más allá de la Tierra. Desde la observación de los astros y el posterior estudio de las leyes físicas que rigen el Universo, hasta las exploraciones espaciales recientes. El libro repasa continuamente los aportes científicos de Tsiolkovski, Oberth, Goddard, Einstein, Hohmann e incluso describe cómo este último encontró un camino sencillo para viajar a otros planetas antes de que se inventase la nave espacial. Aparte de estos conceptos, el...

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute...

INTRODUCCIÓN La publicación de este libro tiene lugar tras celebrarse el setenta aniversario de la aprobación de la Constitución italiana, tras la cual se convocaron las primeras elecciones dentro del marco de la I República italiana, nacida un año antes. Desde entonces, Italia ha vivido hasta 17 legislaturas distintas (sin olvidar la etapa de la Asamblea Constituyente, entre mediados de 1946 y finales de 1947), si bien pocas de ellas han alcanzado los cinco años de vida que le permite la Ley Fundamental del Estado por la que se rige el Estado transalpino. En efecto, en esas 17...

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute...