对历史上的大多数时代进行准确的划分并非易事,然而确定太空时代却并不困难。1957年10月4日,苏联发射了一颗人造地球卫星,它是一颗重184磅、每96分钟绕地球一周的炮弹,于是,太空时代几乎没有什么前兆便突然逼近了我们。在第一颗原始卫星发射后不到4年,苏联的尤里·加加林,一位27岁的战斗机驾驶员,成了环绕地球作轨道飞行的第一人。苏联的成功促使肯尼迪总统下了决心,美国应该在60年代末之前“把一个人送上月球并使其安全地返回地球”。我们现在面临的不仅是一个太空时代,而且是一场太空 Accurately dividing most of the history in history is not an easy task, yet defining the space age is not difficult. On October 4, 1957, the Soviet Union launched an artificial Earth satellite, a 184-pound shell that landed around the Earth every 96 minutes. As a result, the space age approached us with few warnings. Less than four years after the launch of the first primitive satellite, Yuri Gagarin, a 27-year-old fighter pilot from the Soviet Union, became the first man orbiting the Earth. The Soviet Union’s success prompted President Kennedy’s determination that the United States should “send a man to the moon and return it safely to the earth” by the end of the 1960s. What we are now facing is not only a space age, but also a space