Photograph of Carl Sagan
Robert Reichert and Cornell University.
Carl Sagan
Carl Sagan is an American astronomer who was born in 1934.
He is famous for his research on the origins of life and his belief that life
exists elsewhere in the universe.
Sagan is a leading figure in the search for extraterrestrial intelligence.
He studied the possibility of life
on Titan, Saturn's
largest moon, whose atmosphere
has similar chemistry to that of Earth. Sagan has also
played a prominent role in the U.S. space program, with his involvement in the Mariner,
Viking, and Voyager spacecraft expeditions. He has made valuable contributions to our
understanding of planetary atmospheres and planetary surfaces.
Sagan passed away on December 20, 1996.
You might also be interested in:
How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable.
...more
How did it all begin? Perhaps the most intriguing question we, as human beings, could ever contemplate is that of our own origin. At least three classes of hypotheses exist attempting to explain the origin
...moreWhere might we find extraterrestrial life in the solar system, and in what ways might an habitable place be different from Earth? Warmth? It seems that the temperature on Earth (room temperature, so to
...more
Titan is the only moon in our Solar System with a significant atmosphere. Titan's atmosphere consists mostly of nitrogen, and is so thick that the atmospheric pressure at the moon's surface is about 6
...more
Carl Sagan Stephen J. Gould Marie Curie Charles Darwin Louis Pasteur Leonardo Da Vinci
...more
Richard Feynman was an American physicist who lived between 1918-1988. He was one of the most influential theoretical physicists of the twentieth century, contributing to many areas of physics including
...more
Stephen Jay Gould was an American paleontologist and evolutionary biologist who was born in 1941. He revised Darwin's theory of evolution, introducing his own concept of punctuated equilibrium. This states
...more
Evelyn Granville is an American mathematician who was born in 1924. She was one of the first black women in the United States to receive a Ph.D. in mathematics. She has made many contributions to NASA's
...more
