Extreme states of matter on earth and in the cosmos

1. Introduction.- 2. Matter under Extreme Conditions: Classification of States.- 3. High Energy Densities in Laboratories.- 4. High-Power Lasers in High-Energy Density Physics.- 5. Relativistic Charged Particle Beams.- 6. Technical Applications of the Physics of High Energy Densities.- 7. Astrophysical Aspects of High Energy Densities.- 8. Conclusion.