30年前的10月4日,苏联成功地发射了世界上第一颗人造地球卫星,揭开了人类进入空间活动的帷幕。到1987年6月底,全世界共发射了人造空间飞行器3381个,有313人次进入空间轨道,其中有12人登上月球,在月面上总共停留280小时。现在世界上约有58个国家投资发展空间技术,有170多个国家和地区应用空间技术的成果,从事空间技 Thirty years ago, on October 4, the Soviet Union successfully launched the world’s first man-made earth satellite, opening the curtain on mankind’s entry into space. By the end of June 1987, a total of 3,381 manmade space vehicles were launched throughout the world, with 313 people entering the space orbit, 12 of them on the moon and a total of 280 hours on the moon surface. At present, about 58 countries in the world invest in and develop space technology, and more than 170 countries and regions have applied the achievements of space technology to space technology