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10月4日,苏联发射出世界上第一个人造地球卫星,这个震动世界的消息标志着人类科学发展的新紀元,便为实现星际旅行开辟了新道路。什么叫人造卫星? 人造卫星就是我們用人工制造出来的卫星,就是一个人造的“小月亮”。它和地球的其他卫星一样,能在空中按照一定的轨道环繞地球运行。人造卫星是一个球形体,这次苏联发射的人造卫星,它的直徑是58公分(等于市尺一尺七寸半),它的重量是83.6公斤(等于167.2市斤)。
On October 4, the Soviet Union launched the world's first man-made earth satellite. This news of shaking the world marks a new era in the development of human science and opens up a new path for the realization of interstellar travel. What is an artificial satellite? A satellite is the satellite we made artificially. It is an artificial “little moon.” Like other earth satellites, it can orbit the Earth in a certain orbit in the air. The satellite is a spherical body. The Soviet satellite launched this time has a diameter of 58 centimeters (equivalent to one and a half feet) and weighs 83.6 kilograms (167.2 kilos).