Science of travel in space

Space Science Hello everyone , If you want's to know about the science, universe and many more facts about the science and also about the human psychology or anything then this is the amazing page for you. Now you are going to be reading very exciting and interesting topics about the science, engineering, Universe, space and many more things. Now let's talk about the travelling concept which I'm going to explore in an authentic way.  On earth anything move and travel with the help of friction or air pressure. A car moves on earth with the help of enough friction. Similarly helicopters and planes are flying by having air pressure. So these things are travelling on earth very easily. But these conditions are totally different in space. In space there is no gas and nor friction of anything. So the travelling is more difficult for any object in space. So when anything travels in space it have different sufficient conditions of the earth. Space - The space has two meanings. It