I wanted initially to treat about Astronomy on a large view : given the huge number of informations and e-encyclopedia (like Wikipedia but not only) on the web explaining with real pedagogy many aspects of this so large field of knowledge, I decided to present some classical topics that I consider especially interesting. Here a brief outline :

• Olbers' Paradox


• Mach's Principle


• The Cosmos and life

• Pictures

• Euclid mission


• Planck mission


• Atlas of the Universe