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| This 1961 photograph shows a young Carl Sagan shortly after he received in PhD. in astronomy and astrophysics. © Bettmann/CORBIS |
Before Neil deGrasse Tyson, there was Carl Sagan. Handsome, articulate and witty, Sagan wasn't a man about town. He was a man about the cosmos. A tireless proponent of the universe, he was a pioneer in bridging the gap between science and nonscientists.
He was a giant among his peers, too. Sagan received 22 honorary degrees from colleges and universities throughout the U.S., published more than 600 scientific papers and articles, authored best-selling books and hosted a record-breaking public television series, "Cosmos: A Personal Voyage." He discovered how Venus was heated -- through the greenhouse effect (something scientists later learned also happened on Earth) and that the red color of Mars came from windstorm dust rather than vegetation. NASA explorations eventually proved he was right [source: Kiger].
Sagan was born in 1934 and grew up in Brooklyn, New York. He graduated from the University of Chicago in 1960 with a doctorate in astronomy and astrophysics, then taught at Harvard and Cornell, where he became the director of Cornell's Laboratory for Planetary Studies and the David Duncan Professor of Astronomy and Space Sciences.
Some of Sagan's most memorable contributions occurred outside the classroom. During the 1950s and 1960s, he was NASA's astronaut whisperer. He offered advice to the Apollo crew before their journeys to the moon and conceived experiments for other planetary expeditions, including an interstellar record designed to greet the unknown inhabitants of deep space [source: Center for Inquiry]. And that's just one cool thing on our list.
Sagan was born in 1934 and grew up in Brooklyn, New York. He graduated from the University of Chicago in 1960 with a doctorate in astronomy and astrophysics, then taught at Harvard and Cornell, where he became the director of Cornell's Laboratory for Planetary Studies and the David Duncan Professor of Astronomy and Space Sciences.
Some of Sagan's most memorable contributions occurred outside the classroom. During the 1950s and 1960s, he was NASA's astronaut whisperer. He offered advice to the Apollo crew before their journeys to the moon and conceived experiments for other planetary expeditions, including an interstellar record designed to greet the unknown inhabitants of deep space [source: Center for Inquiry]. And that's just one cool thing on our list.
How Stuff Works: 10 Coolest Things About Carl Sagan
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