1957年10月4日将被作为人类历史上最光辉的一页而载入史册。这一天,社会主义和平民主阵营的堡垒——苏联成功地发射了第一颗人造地球卫星,实现了数千年来人类想飞到地球以外去的伟大的理想的第一步。什么是人造地球卫星我们的地球原来就有一个卫星,那就是我们的月亮,它在离地球38万多公里以外,以每秒钟约1公里的速度不停地围绕着地球旋转着。我们都知道,地球是有着强 October 4, 1957 will be recorded as one of the most glorious pages in human history. On this day, the fortress of the socialist camp of peace and democracy, the Soviet Union successfully launched its first man-made earth satellite and achieved the first step toward the great ideal that mankind wanted to fly beyond the Earth for thousands of years. What is a man-made earth satellite Originally, there was a satellite on our earth, our moon, which is constantly spinning around the earth at a speed of about 1 kilometer per second, more than 380,000 kilometers away from the Earth. We all know that the earth is strong