Influencias astron\'omicas sobre la evoluci\'on geol\'ogica y biol\'ogica de la Tierra (parte I)

Abstract

This monograph presents a study of the nature and origin of meteorites, asteroids and comets; and of the consequences of encounters of these cosmic objects with the Earth. The purpose of this monograph is mainly of divulgation for non-specialists, even though we have not avoided some elementary technical aspects and some own proposals: 1) Calculation of the evolution of an expanding bubble originated by the explosion of a cosmic object that releases 50 Mt of energy in the terrestrial atmosphere, at a height of 5 km from the ground. 2) A new explanation of the white nights observed in Eurasia and of other phenomena related to the Tunguska's explosion of 1908.