Carl Sagan citations

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Carl Sagan

Date de naissance: 9. novembre 1934
Date de décès: 20. décembre 1996
Autres noms: Karl Seýgan

Carl Edward Sagan , né le 9 novembre 1934 à Brooklyn, New York et mort le 20 décembre 1996 à Seattle, Washington, est un scientifique et astronome américain. Il est l'un des fondateurs de l'exobiologie. Il a mis en place le programme SETI de recherche d'intelligence extraterrestre et réalisé pour la télévision la série de vulgarisation scientifique Cosmos, diffusée sur plusieurs continents. Il est aussi connu pour son scepticisme.

Œuvres

Cosmos
Carl Sagan
Broca's Brain
Carl Sagan

Citations Carl Sagan

„99 pour cent de l'atmosphère de la Terre est d'origine biologique. Le ciel est fait de vie.“

—  Carl Sagan, livre Cosmos

99 per cent of the Earth's atmosphere is of biological origin. The sky is made by life.
en
Cosmos, 1980

„Parfois, la pseudoscience est une espèce de maison de transition entre la vieille religion et la science nouvelle, dont tous les deux se méfient.“

—  Carl Sagan, livre The Demon-Haunted World

Sometimes [Pseudoscience] is a kind of halfway house between old religion and new science, mistrusted by both.
en
The Demon-Haunted World (1995)

„Dans la pseudoscience, les hypothèses sont souvent formulées de telle manière qu'elles soient invulnérables à toute expérience qui puisse les réfuter; comme cela même en principe c'est impossible de les invalider. Ceux qui la pratiquent sont toujours sur la défensive et méfiants. Ils s'opposent à l'examen sceptique; et quand l'hypothèse pseudoscientifique ne réussit pas à convaincre les scientifiques, ils déduisent qu'il y a des conspirations pour la supprimer.“

—  Carl Sagan, livre The Demon-Haunted World

[In Pseudoscience] hypothesis are often framed precisely so that they are invulnerable to any experiment that offers a prospect of disproof, so even in principle they cannot be invalidated. Practitioners are defensive and wary. Skeptical scrutiny is opposed. When the pseudoscientific hypothesis fails to catch fire with scientists, conspiracies to suppress it are deduced.
en
The Demon-Haunted World (1995)

„Tu es fait de cent mille milliards de cellules. Nous sommes, chacun, une multitude.“

—  Carl Sagan, livre Cosmos

You are made of a hundred trillion cells. We are, each of us, a multitude.
en
Cosmos, 1980

„Des affirmations extraordinaires nécessitent des preuves extraordinaires.“

—  Carl Sagan, livre Cosmos

Extraordinary claims require extraordinary evidence.
en
Citation presque identique à Extraordinary claims require extraordinary proof. de Marcello Truzzi, co-fondateur du Committee for Skeptical Inquiry.
Cosmos, 1980

„Nous sommes comme des papillons qui battent des ailes pendant un jour en pensant que c'est l'éternité.“

—  Carl Sagan, livre Cosmos

We are like butterflies who flutter for a day and think it is forever.
en
Cosmos, 1980

„To live in the hearts we leave behind is to live forever.“

—  Carl Sagan, Billions & Billions: Thoughts on Life and Death at the Brink of the Millennium

Source: Billions & Billions: Thoughts on Life and Death at the Brink of the Millennium

„And chicken soup is widely known to be good for life.“

—  Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)
Contexte: The amount of organic matter that could have been produced in the first few hundred million years of Earth history was sufficient to have produced in the present ocean a several-percent solution of organic matter. This is just about the dilution of Knorr's chicken soup, and not that different from the composition either. And chicken soup is widely known to be good for life.

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„Consider again that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar", every "supreme leader", every saint and sinner in the history of our species lived there — on a mote of dust suspended in a sunbeam.
The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner, how frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds.
Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.
The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand.
It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we've ever known.“

—  Carl Sagan, livre Pale Blue Dot

p. 8, Supplemental image at randi.org http://www.randi.org/images/122801-BlueDot.jpg
Source: Pale Blue Dot: A Vision of the Human Future in Space (1994)

„If we are alone in the Universe, it sure seems like an awful waste of space.“

—  Carl Sagan, Contact

This is a paraphrase of Sagan quoting Thomas Carlyle: "A sad spectacle. If they be inhabited, what a scope for misery and folly. If they be not inhabited, what a waste of space."
Sagan delivered this quote during the symposium on "Life Beyond Earth and the Mind of Man", held at Boston University (20 November 1972), published in Life Beyond Earth and the Mind of Man (1973) edited by Richard Berendzen; Life Beyond Earth and the Mind of Man (1975) National Archives video http://www.youtube.com/watch?v=cQeOp7a8QMI
Misattributed
Source: Contact

„For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.“

—  Carl Sagan, livre The Demon-Haunted World

Ch. 1 : The Most Precious Thing, p. 12
The Demon-Haunted World : Science as a Candle in the Dark (1995)
Source: The Demon-Haunted World: Science as a Candle in the Dark

„We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.“

—  Carl Sagan, livre Cosmos

p. 193
Source: Cosmos (1980)
Contexte: We embarked on our journey to the stars with a question first framed in the childhood of our species and in each generation asked anew with undiminished wonder: What are the stars? Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.

„Understanding is a kind of ecstasy“

—  Carl Sagan, livre Broca's Brain

Source: Broca's Brain: Reflections on the Romance of Science

„Absence of evidence is not evidence of absence.“

—  Carl Sagan, livre Cosmos

Martin Rees — Sagan refers to this quote in The Demon-Haunted World (1995) (see above)
Misattributed
Source: Cosmos

„Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Etiam egestas wisi a erat. Morbi imperdiet, mauris ac auctor dictum.“

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