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近十年来,美国科技界对寻找地球外文明产生了浓厚的兴趣,特别是美国行星际协会一直在大力支持这项研究活动。美国喷气推进实验室主任布鲁斯·默里博士认为,寻找地外文明是个极为重要的问题,而且在今天科学技术迅速发展的时代里,人类已有能力探测到来自宇宙中其它文明星球的射电信号。但在目前,地球大气层内人造的无线电噪音正在日益增加,预计在今后10～20年内,将可能使地球上的接收机无法探测到来自其他
In the past ten years, the American science and technology community has shown great interest in finding extraterritorial civilizations. In particular, the Inter-American Society for Intergration has been strongly supporting this research activity. Dr. Bruce Murray, director of the Jet Propulsion Laboratory, believes that finding extratermanary civilizations is an extremely important issue and that mankind has been able to detect radio signals from other civilized planets in the universe in an era of rapid development of science and technology. However, man-made radio noise in the Earth’s atmosphere is increasing at present, and it is estimated that in the next 10 to 20 years, it may be impossible for receivers on Earth to detect noise from other