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Sagan was also notable for his speech mannerisms, often spoofed and referenced in the media during the height of his popularity - as a celebrity scientist, he was an occasional guest on popular entertainment programs. The phrase "billions of billions of stars" is popularly associated with him, though he never actually used it.<ref>http://www.nytimes.com/learning/general/onthisday/bday/1109.html</ref>
Sagan was also notable for his speech mannerisms, often spoofed and referenced in the media during the height of his popularity - as a celebrity scientist, he was an occasional guest on popular entertainment programs. The phrase "billions of billions of stars" is popularly associated with him, though he never actually used it.<ref>http://www.nytimes.com/learning/general/onthisday/bday/1109.html</ref>
Sagan had a notable effect on the space program, being the man who conceived the first written message to go into space, on gold plaques attached to the Pioneer 10 and 11 spacecraft. Later, he would be a part of the team that assembled golden records, containing information on Earth's culture and daily life, that would go out with the Voyager space probes later.
==Climate change==
==Climate change==