ABSTRACT
Space attracts, worries, and questions human being for ages, as a frontier set between us and farther horizons to discover. Successive steps were made to unveil its mysteries, before the exploration really started fifty years ago. Scientific description of space started in the middle of the second millennium, at a period when Copernic description of the solar system began to be accepted. Space was then seen as a medium where gods, stars, and comets reside. In Europe, it was described as successive spheres that symbolize way to paradise. Earth is wrapped up in a protective shell made of atmosphere and magnetosphere. The atmosphere protects us from neutral particles and high-energy light waves. The magnetosphere extends at a long distance from Earth and acts as a shield against charged particles from solar wind and cosmic rays.
