Table of contents : Introduction....Pages 1-4 Advances in Understanding Elements of the Sun—Earth Links....Pages 5-24 Some Basic Aspects of the Solar Wind....Pages 25-52 The Solar Spectrum in the UV, EUV, and X Ranges: Observations, Modelling, and E.ects on the Earth Upper Atmosphere in the Frame of Space Weather....Pages 53-91 Earth Radiation Belts....Pages 93-118 Radio Emissions from the Sun and the Interplanetary Medium....Pages 119-142 The Sun, The Earth, and the Space Weather....Pages 143-164