There is no RationalWiki without you. We are a small non-profit with no staff – we are hundreds of volunteers who document pseudoscience and crankery around the world every day. We will never allow ads because we must remain independent. We cannot rely on big donors with corresponding big agendas. We are not the largest website around, but we believe we play an important role in defending truth and objectivity.
If everyone who saw this today donated $5, we would meet our goal for 2019.
| Fighting pseudoscience isn't free.|
We are 100% user-supported! Help and donate $5, $20 or whatever you can today with !
| The poetry of reality|
|We must know. |
We will know.
|A view from the|
shoulders of giants.
| This might be|
|But we're not sure|
“”The Cosmos is all that is, or ever was, or ever will be. Our contemplations of the Cosmos stir us — there is a tingling in the spine, a catch in the voice, a faint sensation as if a distant memory, of falling from a great height. We know we are approaching the grandest of mysteries.
|—Carl Sagan, Cosmos|
Carl Sagan (1934–1996) was an American astronomer who did much to popularize science, especially astronomy, during his illustrious career. He co-wrote and presented Cosmos: A Personal Voyage, a television series that kicked ass. His legacy lies mostly in his advancement of humanism. He found a profound spirituality in experiencing the wonder and majesty of the universe.
He is known for remarking how people were made of "star stuff." And, by the by, he was right: H → He → Li → Be → B → C → N → O → F, and on through various nuclear processes that synthesize the elements up to iron (Fe) — and it takes a supernova (or a particle accelerator!) to make a heavier nucleus.
In 1974 he was enlisted by the American Association for the Advancement of Science (AAAS) to lead the attack at their conference debunking the theories of Immanuel Velikovsky. His rather cavalier performance at this event was perhaps a salutary lesson in the fight against woo: far from stamping out the growing cult of Velikovsky, he arguably further stoked it, by allowing a few schoolboy errors to creep into his math and peppering his talk with cheeky jokes. This use of levity and lack of rigour was seized upon by the Velikovsky faithful as evidence that Thine Mainstream were not playing fair and were trying to suppress the truth.
A prominent non-believer, Carl Sagan is said by many fundamentalists to have converted to Christianity on his deathbed, the testimony of his widow notwithstanding. This is a cowardly attack because they know Dr. Sagan can't come back to make a refutation.[notes 1] Some of them point to a quote from his famous novel Contact about "an intelligence that antedates the Universe" as evidence of this change in beliefs, but fellow science fiction author Robert J. Sawyer, also an agnostic, has pointed out Sagan was no more obligated to believe in the religious aspects of that novel than Star Wars creator George Lucas was to believe in The Force.
A recent development is the celebration of "Carl Sagan Day," which is celebrated on his birthday, November 9. The first celebration of the event, in 2009, was attended by James Randi and Phil Plait as guest speakers.
He was and still remains to this day arguably one of the greatest science communicators ever. Simultaneously, he was, and still after his death remains the greatest human being who ever lived.
Carl Sagan was a leader in the American space program from its earliest stages. He briefed the Apollo astronauts before the Moon missions and played an instrumental role in the planning and operation of the Viking, Voyager, Mariner, and Galileo space probes. He was also a prolific author and popularizer of science, creating the 13-part TV series Cosmos (the most widely watched PBS program in the world), appearing on late-night television numerous times, and writing Contact, Pale Blue Dot, Billions and Billions, and many other books. He married three times, the third time to Ann Druyan, his occasional co-author. He died in 1996 at the age of 62 after a prolonged battle with cancer, survived by Druyan and five children.[notes 2]
Sagan called himself agnostic, although he is best defined today as a freethinker or a pantheist. He himself rejected the term "atheist", as he defined it as someone who knows there is no God. His definition is considered inaccurate by some today, but we're getting into Judean People's Front territory here.
“”Imagine, a room, awash in gasoline. And there are two implacable enemies in that room. One of them has 9,000 matches. The other has 7,000 matches. Each of them is concerned about who's ahead, who's stronger. Well, that's the kind of situation we are actually in. The amount of weapons that are available to the United States and the Soviet Union are so bloated, so grossly in excess of what's needed to dissuade the other that if it weren't so tragic, it would be laughable.
Sagan helped develop the TTAPS (short for the co-authors of the original paper, Turco, Toon, Ackerman, Pollack, and Sagan) climate model that predicted a resulting "nuclear winter" in the event of nuclear warfare. Though later research revised the total cooling effect downward (and even later research bumped it back up a bit), the concept of nuclear winter has been considered a valid prediction by the scientific community. The TTAPS model was used to argue against Ronald Reagan's Star Wars plan (i.e., the defense system would have to be perfect to prevent a nuclear strike and ensuing nuclear winter). Partially in response to this theory, Frederick Seitz established the George C. Marshall Institute to deny nuclear winter.
Thankfully, Reagan never got his wish.
“”I think the ratio, R, of the time to sense the dose taken to the time required to take an excessive dose is an important quantity. R is very large for LSD (which I've never taken) and reasonably short for cannabis. Small values of R should be one measure of the safety of psychedelic drugs. When cannabis is legalized, I hope to see this ratio as one of the parameters printed on the pack. I hope that time isn't too distant; the illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship so desperately needed in this increasingly mad and dangerous world.
In the 1990s, Apple was developing a line of three computers based on the new PowerPC processor. As was a common practice at the time, they used internal codenames to refer to these projects in-house, all following a common theme. The Power Macintosh 6100 was codenamed "Piltdown Man," the 7100 was named "Carl Sagan," and the 8100 was named "Cold fusion." These code names appeared from time to time in the trade press.
In 1994, when Carl Sagan discovered his name was used by Apple on the model that would become the 7100 — and that his name was associated with two of the most infamous blunders/hoaxes in the history of modern science — he sued, claiming defamation and wrongful use of his name for commercial purposes. The judge dismissed the suit, stating that Apple had honored him in selecting his name, and since these were not the actual product names, nor released to the general public.
In the meantime, Apple renamed the project BHA. Sagan sued Apple again (and lost), this time because BHA was claimed to stand for "butt-head astronomer". Sagan appealed the decision and the matter was finally confidentially settled out of court.
- "For small creatures such as we the vastness is bearable only through love."
- "How is it that hardly any major religion has looked at science and concluded, 'This is better than we thought! The Universe is much bigger than our prophets said, grander, more subtle, more elegant!'" from Pale Blue Dot
- "It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring."
- "Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out."
- "But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright Brothers. But they also laughed at Bozo the Clown."
- "Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works."
- "Imagination will often carry us to worlds that never were. But without it we go nowhere."
- "The surface of the Earth is the shore of the cosmic ocean. On this shore, we've learned most of what we know. Recently, we've waded a little way out, maybe ankle-deep, and the water seems inviting."
- "Extraordinary claims require extraordinary evidence."
- "The sky calls to us. If we do not destroy ourselves we will one day venture to the stars."
- "On this globe there are national boundaries marked, but on photographs of the Earth from space, there are no national boundaries to be seen, which is perhaps a useful lesson for politicians."
- Planets (LIFE Science Library). Sagan, Carl, Jonathon Norton Leonard and editors of Life, Time, Inc., 1966. ISBN 0-809-40424-9
- Intelligent Life in the Universe. I.S. Shklovskii co-author, Random House, 1966. ISBN 1-892-80302-X
- UFO's: A Scientific Debate. Thornton Page co-author, Cornell University Press, 1972. ISBN 0-801-40740-0
- Communication with Extraterrestrial Intelligence. MIT Press, 1973. ISBN 0-262-19106-7
- Mars and the Mind of Man. Sagan, Carl, et al., Harper & Row, 1973. ISBN 0-060-10443-0
- Cosmic Connection: An Extraterrestrial Perspective. Jerome Agel co-author, Anchor Press, 1973. ISBN 0-521-78303-8
- Other Worlds. Bantam Books, 1975. ISBN 0-553-06439-8
- Murmurs of Earth: The Voyager Interstellar Record. Sagan, Carl, et al., Random House, 1978. ISBN 0-394-41047-5
- The Dragons of Eden: Speculations on the Evolution of Human Intelligence. Ballantine Books, 1978. ISBN 0-345-34629-7
- Broca's Brain: Reflections on the Romance of Science. Ballantine Books, 1979. ISBN 0-345-33689-5
- Cosmos. Random House, 1980. Random House New Edition, 2002. ISBN 0-375-50832-5
- The Cold and the Dark: The World After Nuclear War. Sagan, Carl et al., Sidgwick & Jackson, 1985. ISBN 0-393-30241-5
- Comet. Ann Druyan co-author, Ballantine Books, 1985. ISBN 0-345-41222-2
- Contact. Simon and Schuster, 1985; Reissued August 1997 by Doubleday Books. ISBN 1-568-65424-3
- The Varieties of Scientific Experience: A Personal View of the Search for God. Ann Druyan editor, 1985 Gifford Lectures, Penguin Press, 2006. ISBN 1-594-20107-2
- A Path Where No Man Thought: Nuclear Winter and the End of the Arms Race. Richard Turco co-author, Random House, 1990. ISBN 0-394-58307-8
- Shadows of Forgotten Ancestors: A Search for Who We Are. Ann Druyan Coauthor, Ballantine Books, 1993. ISBN 0-345-38472-5
- Pale Blue Dot: A Vision of the Human Future in Space. Random House, 1994. ISBN 0-679-43841-6
- The Demon-Haunted World: Science as a Candle in the Dark. Ballantine Books, 1996. ISBN 0-345-40946-9 (Note: the book was first published and copyrighted in 1995 with an errata slip inserted)
- Billions and Billions: Thoughts on Life and Death at the Brink of the Millennium. Ann Druyan coauthor, Ballantine Books, 1997. ISBN 0-345-37918-7
- The Varieties of Scientific Experience: A Personal View of the Search for God. Carl Sagan (writer) & Ann Druyan (editor), Penguin Press HC, 2006. ISBN 1-594-20107-2
- Neil deGrasse Tyson (Cosmos II!)
- The Fine Art of Baloney Detection
- The Dragon in My Garage
- Patrick Moore
- The Carl Sagan Portal
- Lands' End, for turtlenecks
- Science and Superstition
- Carl Sagan on God
- Carl Sagan quotations
- Why We Need to Understand Science at Skeptical Inquirer
- Sagan's entire series of Christmas Lectures at the Royal Institution in 1977, as broadcast by the BBC
- "Humans are very good at dreaming..."
- The greatest thing that Carl Sagan never did
- Then again, they are fundamentalist Christians. Perhaps some of them think he could pull a Lazarus.
- Thank God for that.
- Cosmos (1980), p.4
- Carl Sagan Day
- R. P. Turco, O. B. Toon, T. P. Ackerman, J. B. Pollack and Carl Sagan. Nuclear Winter: Global Consequences of Multiple Nuclear Explosions. Science 1983: Vol. 222 no. 4630 pp. 1283-1292. (Full text of a later article called Climate and Smoke.)
- See Wikipedia's nuclear winter article for a fuller treatment.
- Essay by Carl as the pen name Mr. X, written in 1969 for Marihuana Reconsidered (1971) by Dr. Lester Grinspoon
- Biographer: Astronomer Carl Sagan Smoked Marijuana, AP
- Sagan sues Apple over name
- Christmas Lecture, 1977