2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51488New Developments in String Gravity and String Cosmology are reported: 1-String driven cosmology and its Predictions. 2-The primordial gravitational wave background in string cosmology. 3-Non-singular string cosmologies from Exact Conformal Field Theories. 4-Quantum Field Theory, String Temperature and the String Phase of de Sitter space-time, 5-Hawking Radiation in String Theory and the String Phase of Black Holes. 6-New Dual Relation between Quantum Field Theory regimes and String regimes in Curved Backgrounds, and the 'QFT/String Tango'. 7- New Coherent String States and Minimal Uncertainty Principle in WZWN modelsChalonge School Lectures on Astrofundamental Physics, 9th Course 7-18 September 2002, To appear in the Proceedings edited by N.G. Sanchez and Yu. Parijskij, NATO ASI Series, Kluwer PubHigh Energy Physics - TheoryAstrophysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenologytext