space [speis] 太空，深空 Travelling in space 遨游太空 rocket 火箭 the exploration of space 太空探索 Spacecraft tracking 太空船追踪 space missions 太空计划 Space camp 太空营 space bullet 太空子弹 Space Telescope 太空望远镜 spacewalking 太空行走
Some people think， can gain new knowledge expanding human living space from space to obtain the new Others think don't agree because costly and astronauts safety problems
