Space exploration always was the dream of humanity. Observation of sky and stars were conducted even by ancient Greeks. Nowadays, when we finally have proper tools for exploring the galaxy we can ask ourselves about the pros and cons of presence of human in the space. First of all, development of space technology guides us to continuous evolution in everyday life. Maybe someday rockets from space shuttles will be mounted in our cars? Furthermore, experiments conducted in space can give us knowledge which may in future help solve today’s problems. People should explore the space to discover new things such as new minerals which may be helpful for next generations. On the other hand, huge amounts of money are being spent on space exploration instead of finding solutions for existing problems on this planet...