Carl Sagan's birthday would have been today. I would wax lyrical about it but...oh, wait, I wrote an essay. This one is, hopefully, going to pull double-duty as another article published in the same place as my Feynman essay. Please, enjoy. He was a great man, truly.
A Candle in the Dark
Last month I wrote about Richard Feynman. Though a great man—I frequently refer to him as “my favorite person”--it has to be said that he never really embraced his role as a public figure. He lived life by the maxim that he was not responsible for the world he lived in, and so never became what we would call politically active. Luckily, others filled that role. In 1934, another scientist was born and this one, though he had scientific accomplishments, will always be remembered first and foremost as a presenter. That man, astronomer Carl Sagan, popularized science. Through his books and television programs, he brought the modern ideas and discoveries of science to the masses—and then, years after his death, he performed admirably as a singer in an ongoing series of YouTube videos, with only slight assistance from AutoTune. All of this makes him not only the most musical missionary of the scientific worldview, but also the most effective.
Anytime I try to describe scales larger than the Earth, I end up quoting Carl Sagan—or I end up talking enough like him that I might as well be. It was one of his signature abilities, the way he would express his awe and wonder at the modern universe we discovered. The most evocative example might have been his famous “Pale Blue Dot” speech, recreated in his excellent book of the same name. You see, in 1990 Carl Sagan made a request of NASA (Carl Sagan having been one of the lucky few people capable of making requests of NASA). Voyager 1, one of the few spacecraft on course to leave the solar system and currently ten billion miles away, had completed its primary mission of planetary exploration, and so it was ordered to turn its camera Earthward and take a picture. The image literally makes the mind boggle, and I'm not even sure what it means for a mind to literally boggle. I'd figure it out, but my mind is too busy boggling. Anyway, looking at it, you will see on the far right a golden streak of sunlight. In the middle of that, if you know where to look, you'll see a single blue pixel, barely visible at all. As Sagan said—and I recommend looking up the recording of this on the Internet—“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.” In a way, much of Carl Sagan's work attempts to force a sense of perspective on the reader, to show them exactly what the universe looks like and to accept it. Some might take this an excuse for nihilism, but Sagan was able to move past such simplistic bleakness and embrace this view. He saw it not as a way to devalue humans, but as proof of how precious life was. In Cosmos he wrote, “Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.”
Sagan had a pattern of such attitudes. Having accepted scientific findings, he attempted to apply them—to ethics, to philosophy, and to the human condition. Out of the physical phenomena around him he attempted to crystallize real consequences that could be related to by his audience, and he regarded his audience as potentially everyone. Science, to Sagan, was not just for scientists. In his book The Demon Haunted World: Science as a Candle in the Dark, Sagan made the case that superstition and credulity were not just false, but actively dangerous in a democratic society. In a modern society so based on technology and the findings of science, Sagan felt extremely uneasy that so few people really understood science—not just “science” in the sense of a list of facts about the world, but “science” as a way of thinking. “In every country, we should be teaching our children the scientific method and the reasons for a Bill of Rights. With it comes a certain decency, humility and community spirit. In the demon-haunted world that we inhabit by virtue of being human, this may be all that stands between us and the enveloping darkness.” Living in a time threatened by nuclear war, he referred again to the scale of the cosmos to demonstrate the insanity of it all—“Astronomically, the US and the USSR are the same place.” He recognized that science, for all the lives saved and bettered by its progress, now also posed a threat in the form of global warming, ozone depletion, and the capacity for nuclear holocaust. Therefore he considered it extremely important that people understand the reasons and science behind these issues, because that was the only way to be sure that technology would continue to enable humanity, rather than be its ultimate annihilator.
He was, however, quite confident in the capability of humanity to use technology to achieve greatness. Most commonly, he campaigned for the continued human exploration of space. His arguments for it feel sobering now, considering that America will no longer be capable of manned spaceflight after the final Shuttle launch early next year. He had purely scientific and economic reasons, most of which, while valid, have been heard before, but he had others as well. The threat of asteroid impact meant, he said, “Since, in the long run, every planetary society will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring — not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive.” Sagan was, of course, not short on exploratory or romantic zeal. He saw space travel as a great human accomplishment, a scientific achievement that could draw us together as a species. One story he told (which resonated with me tremondously): “A scientific colleague tells me about a recent trip to the New Guinea highlands where she visited a stone age culture hardly contacted by Western civilization. They were ignorant of wristwatches, soft drinks, and frozen food. But they knew about Apollo 11. They knew that humans had walked on the Moon. They knew the names of Armstrong and Aldrin and Collins. They wanted to know who was visiting the Moon these days.”
I write this on what would have been Sagan's seventy-sixth birthday, had he not passed away in 1996. It has been declared—by the luminaries in my Twitter feed—that November 9th is Carl Sagan Day, and I think he deserves it. Sagan was many things. He was a scientist, an astronomer. He was a philosopher, a humanist. He was a performer, in some ways. But most of all, he was a translator. He translated not a foreign language, but the modern universe, a universe that often seems just as alien. We all know, in an abstract sense, that we are immersed in a great cosmos far larger than ourselves. Sagan, however, took that fact and demonstrated that this truth is no abstraction. Rather, it's the most concrete fact in the world, a piece of wisdom and perspective that all too often seems lost in the chaos of human lives. He translated between scientific truth and the personal, emotional truth that we feel, and, gazing at the sky, dared us to quite literally reach for the stars. A still more glorious dawn awaits, he claimed, not a sunrise, but a galaxyrise...
(Works of Carl Sagan I can recommend: The Demon Haunted World, Cosmos, Pale Blue Dot: A Vision of the Human Future in Space , all of which are books. Also worth looking into is the Cosmos television show. And it'd be a crime not to mention the half-dozen Symphony of Science videos, which feature Carl Sagan most prominently, of which “Glorious Dawn” is the most famous. These are availably on YouTube, but are gathered conveniently at symphonyofscience.com)