The 20th century was remarkable for its fast progress in science and technology. Some people see exploring outer space as the main accomplishment of the previous century, whereas others believe that there were more significant attainments. As for me, I support the first opinion. To begin with, spaceflights were a major breakthrough because they differed radically from everything man had achieved over many centuries. For the first time in history humans travelled beyond the Earth’s atmosphere to learn more about the universe...