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<p><b>New page</b></p><div>'''Carl Sagan''' was an American astronomer, planetary scientist, and science communicator. He is best known for the television series Cosmos, which brought the astronomy to millions of the viewers.<br />
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== Early Life and Education ==<br />
Sagan was born in 1934 in Brooklyn, New York. His parents were Jewish immigrants from the Eastern Europe.<br />
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He studied at the University of Chicago and took his doctorate in astronomy and astrophysics in 1960. He was a graduate student of the physicist and the astronomer.<br />
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He taught at Harvard University and later at Cornell University. He became the director of the Laboratory for the Planetary Studies.<br />
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== The Scientific Work ==<br />
Sagan contributed to the study of the planetary atmospheres and the greenhouse effect. He showed that the high temperature of Venus was caused by the greenhouse effect.<br />
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He worked on the missions of the Mariner and the Viking and the Voyager spacecraft. He designed the plaques and the records that carried the messages to the extraterrestrial.<br />
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He studied the origin of the life and the possibility of the extraterrestrial life. He founded the field of the exobiology.<br />
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He warned of the danger of the nuclear winter in the 1980s. The study showed that the nuclear war would cause the global cooling.<br />
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== The Science Communication ==<br />
Sagan presented the television series Cosmos in 1980. The series was watched by more than five hundred million people in the sixty countries.<br />
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He wrote the book Cosmos that accompanied the series. The book became the bestseller and was translated into many languages.<br />
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He wrote the novels Contact and the other books. The novel Contact was made into the film.<br />
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He founded the Planetary Society to promote the space exploration. The society is the largest of the space advocacy organisations.<br />
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== The Legacy ==<br />
Sagan received the Pulitzer Prize for the book The Dragons of Eden. He received the honours from the scientific and the public institutions.<br />
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He appeared on the television programmes and the public lectures. He was one of the most famous of the scientists of his time.<br />
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He died in 1996 in Seattle. The asteroid and the institute are named in his honour.<br />
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He is remembered as the great populariser of the science. His message of the wonder and the responsibility continues to inspire.<br />
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== The Scientific Research ==<br />
Sagan contributed to the study of the planetary atmospheres. He showed that the high temperature of Venus was caused by the greenhouse effect.<br />
<br />
He worked on the missions of the Mariner and the Viking and the Voyager spacecraft. He designed the plaques and the records that carried the messages.<br />
<br />
He studied the origin of the life and the possibility of the extraterrestrial life. He founded the field of the exobiology.<br />
<br />
== The Cosmos Series ==<br />
Sagan presented the television series Cosmos in 1980. The series was watched by more than five hundred million people.<br />
<br />
He wrote the book Cosmos that accompanied the series. The book became the bestseller and was translated into many languages.<br />
<br />
He founded the Planetary Society to promote the space exploration. He was one of the most famous of the scientists of his time.<br />
<br />
== The Public Role ==<br />
Sagan appeared on the television programmes and the public lectures. He was one of the most famous of the scientists of his time.<br />
<br />
He advocated for the space exploration and the search for the extraterrestrial life. He warned of the danger of the nuclear winter.<br />
<br />
He received the Pulitzer Prize for the book The Dragons of Eden. He received the honours from the scientific institutions.<br />
<br />
== The Legacy and the Memory ==<br />
Sagan died in 1996 in Seattle. The asteroid and the institute are named in his honour.<br />
<br />
He is remembered as the great populariser of the science. The Cosmos series introduced the astronomy to millions of the viewers.<br />
<br />
His message of the wonder and the responsibility continues to inspire. He is one of the most influential of the science communicators.<br />
<br />
== The Scientific Career ==<br />
Sagan studied at the University of Chicago and took his doctorate in 1960. He taught at Harvard and later at Cornell University.<br />
<br />
He became the director of the Laboratory for the Planetary Studies. He worked on the missions of the Mariner and the Viking spacecraft.<br />
<br />
He studied the origin of the life and the possibility of the extraterrestrial life. He founded the field of the exobiology.<br />
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== The Personal Life ==<br />
Sagan married three times and had five children. His wife Ann Druyan collaborated with him on the Cosmos series.<br />
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He was a gifted speaker and a popular lecturer. He was one of the most famous of the scientists of his time.<br />
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He died in 1996 in Seattle. The asteroid and the institute are named in his honour.<br />
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== See also ==<br />
* Astronomy<br />
* Cosmos<br />
* Exobiology<br />
* Science communication<br />
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== References ==<br />
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<ref name="r1">Sagan, Carl. Cosmos. New York: Random House, 1980.</ref><br />
<ref name="r2">Sagan, Carl. The Demon-Haunted World. New York: Random House, 1995.</ref><br />
<ref name="r3">Davidson, Keay. Carl Sagan: A Life. New York: Wiley, 1999.</ref><br />
<ref name="r4">Druyan, Ann and Sagan, Carl. Shadows of Forgotten Ancestors. New York: Random House, 1992.</ref><br />
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[[Category:Astronomy]]<br />
[[Category:Science]]<br />
[[Category:United States]]</div>Huhu