卡尔·萨根在西方国家,尤其是美国。是家喻户晓的科学家和科普作家。他在天文学和科普方面的贡献是近代史上罕见的。他不仅是科学家,同时也是思想家。卡尔·爱德华·萨根1934年11月9日生于纽约布鲁克林市,于1955年在芝加哥大学获得物理学学士学位,1956年获得物理学硕士学位,1960年获得天文学和天文物理学博士学位,60年代早期在哈佛大学执教,1971年任康奈尔大学正教授。1996年12月20日,在与骨髓癌抗争了两年之后,与世长辞,享年62岁。卡尔·萨根一生研究成果惊人。他的研究重点为金星上的温室效应、火星上的季节变化、原子战争所造成的长期环境影响、地球上的生命起源、外星智能生命探索等。他是宇宙生物学的创始人和开拓者之一。长期 Carl Sagan is in Western countries, especially the United States. Is well-known scientists and science writers. His contribution to astronomy and popular science is rare in modern history. He is not only a scientist, but also a thinker. Born in Brooklyn, New York, on November 9, 1934, Carl Eduard Sagan obtained a bachelor’s degree in physics from the University of Chicago in 1955, a master’s degree in physics from 1956, a doctorate in astronomy and astrophysics from 1960, Coached at Harvard University early in the early 1971, Cornell University is a professor. December 20, 1996, after fighting with bone marrow cancer for two years, died, at the age of 62. Karl Sagan’s amazing achievements in his life. His research focuses on the greenhouse effect on Venus, the seasonal changes on Mars, the long-term environmental impact of atomic warfare, the origins of life on Earth, and the exploration of intelligent life of extraterrestrials. He is one of the founders and pioneers of cosmobiology. long