上一期我们曾提到美国于1972年3月2日和次年4月5日发射了“先驱者”10号和11号宇宙飞船,这是两艘用原子能电池作为动力的小飞船(重259千克),它们是地球人派向银河系的第一批“使者”。它们在完成探测木星和土星的任务之后,驶向太阻系边疆及其以外的星际空间飞去。据有关科学家估计,它们于1988年已飞出太阳系并且一去不复返了。 Previous Issue We mentioned that the United States launched the Pioneer 10 and 11 spacecraft on March 2, 1972 and April 5, the following year, which are two small spacecraft powered by atomic batteries 259 kg), which were the first “messengers” sent by Earthmen to the Milky Way. After completing the mission of detecting Jupiter and Saturn, they flew too far to the interplanetary and beyond interstellar space. Scientists estimate that they had flown out of the solar system in 1988 and are gone forever.