Time Quantum and Information This collection of essays presented to Carl Friedrich von Weizsäcker on the occasion of his 90th birthday addresses a wide readership interested in astronomy physics and the&nbsp;history and philosophy of science. The articles&nbsp;treat subjects such as the social responsibility of scientists thermonuclear processes in stars and stellar neutrinos turbulence and the emergence of planetary systems. Furthermore &nbsp;considerable attention is paid to the unity of nature the nature of time and to&nbsp;information about and interpretation of the structure of quantum theory all important philosophical problems of our times. The last section describes von Weizsäckers ur hypothesis and how it will theoretically&nbsp;permit&nbsp;the construction of&nbsp;particles and interactions from quantized bits of information