Brain Pickings

We Are Singing Stardust: Carl Sagan on the Story of Humanity’s Greatest Message and How the Golden Record Was Born


“We [are] a species endowed with hope and perseverance, at least a little intelligence, substantial generosity and a palpable zest to make contact with the cosmos.”

In 1939, just before his fifth birthday, Carl Sagan visited the New York World’s Fair, where he marveled at the Time Capsule evincing the fair’s confidence in the future — a hermetically sealed chamber, filled with newspapers, books and artifacts from that year, buried in Flushing Meadows to be revisited in some far-off future era by a future culture very different from and curious about the present. “There was something graceful and very human in the gesture, hands across the centuries, an embrace of our descendants and our posterity,” Sagan writes in Murmurs of Earth: The Voyager Interstellar Record (public library) — the fascinating chronicle of how, in the early fall of 1977, he and a team of collaborators imbued a similar time capsule with even greater hopefulness of cosmic proportions and sent it into space aboard the Voyager spacecraft as humanity’s symbolic embrace of other civilizations. On it, they set out to explain our planet and our civilization to another in 117 pictures, greetings in 54 different languages and one from humpback whales, and a representative selection of “the sounds of Earth,” ranging from an avalanche to an elephant’s trumpet to a kiss, as well as nearly 90 minutes of some of the world’s greatest music.

Sagan, in his characteristic eloquence, writes of the motivation, offering a poetic, humbling, and timelier than ever reminder of just how misplaced our existential arrogance is:

The coming of the space age has brought with it an interest in communication over time intervals far longer than any [of our predecessors] could have imagined, as well as the means to send messages to the distant future. We have gradually realized that we humans are only a few million years old on a planet a thousand times older. Our modern technical civilization is one ten-thousandth as old as mankind. What we know well has lasted no longer than the blink of an eyelash in the enterprise of cosmic time. Our epoch is not the first or the best. Events are occurring at a breathless pace and no one knows what tomorrow will bring — whether our present civilization will survive the perils that face us and be transformed, or whether in the next century or two we will destroy our technological society. But in either case it will not be the end of the human species.

He also reminds us that our existence is a cosmic accident and our lives are shaped by chance encounters, but that’s precisely what makes it all — what makes us — valuable:

There will be other people and other civilizations, and they will be different from us. Our civilization is the product of a particular path our ancestors have followed among the vagaries of historical alternatives. Had events of the distant past taken a slightly different turn, our surroundings and thought processes, what we find natural and hold dear, might be very different. Despite our every sense that things should of course be the way that they are, the details of our particular civilization are extraordinarily unlikely, and it is easy to imagine a set of historical events which would have led to a rather different civilization. . . . This lack of historical determinism in the details of a civilization means that those details are of extraordinary value, not just to professional historians but to all who wish to understand the nature of culture. I think it is this respect for the integuments of a civilization that, above all other reasons, make us sympathetic to the enterprise of time capsuling.

As for the obvious question of how arrogant it seems to assume that if other civilizations exist — something most scientists agree has a high likelihood given the vastness of the cosmos — they would be similar enough to us to be able to interpret our messages, Sagan offers some optimistic rationale:

There is an argument — perhaps it is only a hope — that we might be able to communicate with representatives of such exotic civilizations, because they, like we, must come to grips with the same laws of physics and chemistry and astronomy. The composition of a star and its spectral properties are not fundamental impositions that scientists have made on nature, but rather the other way around. There is an external reality that we ignore at our peril, and indeed much of the evolution of the human species can be described as an increasing concordance between the images within our brains and the reality in the external world. Thus, whatever the differences in starting points, there must come to be a gradual convergence in intellectual content and discipline between diverse planetary species.

And so the idea of the Golden Record was born — a piece of communication that captures the essence of our species and our civilization, and transmits it using the era’s best recording technology and spacecraft to possible others out in the unknown. Sagan’s first thought was to improve on the plaques which accompanied NASA’s Pioneer spacecraft, mankind’s first interstellar probes launched in the early 1970s, which contained some scientific information in textual form and “a sketch of two representatives of the human species greeting the cosmos with hope.” To that, Sagan wanted to add some information from molecular biology to represent what we are made of, and some other materials. He gathered together a small group of scientific consultants, each of whom would advise on the contents of the Voyager message. Some of the opinions were wonderfully poetic — B.M. Oliver, vice-president for research and development at Hewlett-Packard, captured the heart of the project beautifully:

There is only an infinitesimal chance that the plaque will ever be seen by a single extraterrestrial, but it will certainly be seen by billions of terrestrials. Its real function, therefore, is to appeal to and expand the human spirit,and to make contact with extraterrestrial intelligence a welcome expectation of mankind.

Meanwhile, beloved sci-fi author Arthur C. Clarke — who was highly invested in space exploration and had participated in a historic conversation on the subject with Sagan some years earlier — phoned in from Sri Lanka and recommended that the plaque contain the following message, intended as a statement of hope that our civilization would go on long enough for the message to be read:

Please leave me alone; let me go on to the stars.

The original proposal to NASA included this photograph of two nude human beings, which Sagan and his team selected meticulously as a non-offensive image 'neither sexist, pornographic, nor clinical,' to show potential recipients how our bodies look. NASA, however, refused to include it due to fear of potentially negative public reaction. But Sagan and this team decided to keep the silhouette of the picture in the package, feeling strongly that it represented an essential part of who we are and how reproduce.

As more suggestions rolled in, it became clear that the capsule should contain more than scientific information — it should include, rather, a full-spectrum view of humanity, including our artistic footprint. But that would require a recording technology for encoding text, image, and audio, as a visual plaque would no longer suffice. Around the same time, Sagan realized that 1977 was the 100th anniversary of Thomas Edison’s invention of the phonograph. 1977 was also the year when Peter Goldmark, inventor of the long-playing record, perished in a tragic car-crash. Thanks to this bittersweet symmetry and the suggestions of his technological advisors, Sagan decided to encode humanity’s message on a record. And thus the Golden Record was born. He considers the less obvious but no less important reason for this choice, one that honors the notion that emotion is at the heart of human creativity and the intellect alone is never enough:

I was delighted with the suggestion of sending a record for a different reason: we could send music. Our previous messages had contained information about what we perceive and how we think. But there is much more to human beings than perceiving and thinking. We are feeling creatures. However, our emotional life is more difficult to communicate, particularly to beings of very different biological make-up. Music, it seemed to me, was at least a creditable attempt to convey human emotions. Perhaps a sufficiently advanced civilization would have made an inventory of the music of species on many planets, and by comparing our music with such a library, might be able to deduce a great deal about us.

There was another reason for music, too: Because of music’s highly mathematical quality and the fact that scientists believe mathematical relationships hold up for all cultures, philosophies, biologies, and planets, this universality would suggest, as Sagan puts it, “that much more than our emotions are conveyed by the musical offerings on the Voyager record.”

Once the idea was conceived, the first set of challenges were technical. An ordinary vinyl record is made by pressing the vinyl from a mold made of a copper and nickel positive material called “mother.” A vinyl record would be vulnerable to erosion in space, but the “mother” would be considerably less so. But because nickel is ferromagnetic, it would interfere with the fine-tuned magnetic field detection experiments of the Voyager. So Sagan decided that a copper mother would be needed and reached out to the vice-president of RCA Records to help with the technical development of the record.

The Golden Record

But another technical challenge was that, limited by the compression technology of the time, they could only fit around 27 minutes of playing time on each side of a record to be played at a standard 33 1/3 revolutions per minute. One side would be musical, and the other graphical, containing pictures. That immediately put enormous pressure on them as to the selection of the music, given the space afforded was “barely enough for two movements of a single symphony.”

Once again, Sagan enlisted a team of advisors, including various musicologists, conductors, musicians, scholars, and the writer Ann Druyan, with whom he’d go on to fall in love over the course of the project and spend the rest of his life. Among them was the famed 20th-century folk music field collector Alan Lomax, who had spent decades building a classified library of virtually all recorded musical styles in the world. He became a major influence that shaped the Golden Record’s truly global sound. Sagan recalls one of his first encounters with Lomax:

When Lomax first played Valya Balkanska’s soaring Bulgarian shepherdess’ aria for Ann, she was moved to spontaneous dance. “Do you hear that, honey?” he drawled, grinning and leaning forward. “That’s Europe. That’s the first people who had enough to eat.”


We are particularly grateful to him for his help in broadening our transcultural musical perspectives, as well as in substantially enhancing the beauty of the Voyager’s musical offerings.

Eventually, Sagan and his collaborators brainstormed a way to increase the storage capacity: They had a record designed for 16 1/3 revolutions per minute, which would decrease the fidelity slightly, but would more than triple the length to a total of nearly 90 minutes, which Sagan felt would let them “at least approach doing some justice to the range, depth and magic of the world’s music.” But by the time the technical challenge had been solved, the launch date of the Voyager had drawn alarmingly near, which made the decision about what to include all the more overwhelming. Sagan offers a taste of just how dizzying that process was:

There is obviously no best answer about what music to send to the stars; there are as many answers as there are people who attempt to make such a decision.


There were long debates on Gregorian chants, Charles Ives and Bob Dylan (would the music stand if the words were incomprehensible?); whether we should include more than one Bulgarian or Peruvian composition; an Apache lullaby (and the role of Apaches among Native Americans); the definition of Near Eastern music; whether to include music performed by alleged Nazi sympathizers; whether to include music performed by Pablo Casals, whose spirit we very much admired but whose records were of poor quality; which version of the Second Brandenburg Concerto. . . .

They even brushed up against the absurdities of copyright:

We wanted to send “Here Comes the Sun” by the Beatles, and all four Beatles gave their approval. But the Beatles did not own the copyright, and the legal status of the piece seemed too murky to risk.

And yet beneath all the madness lay a heartening allegory for the spirit of the project, best captured in this anecdote by Ann Druyan:

Robert Brown [the executive director of the Center for World Music in Berkeley] had placed Surshri Kesar Bai Kerkar’s “Jaat Kahan Ho” at the top of his list of world music for outer space. It was an old recording that had recently gone out of print. After hunting through a score of record stores without any success, I phoned Brown and asked him to suggest an alternative raga.

He refused.

“Well, what happens if we can’t find a copy of this one in time to get it on the record?” I pleaded. We had three more days in which to complete the repertoire. I was terribly worried that Indian music, one of the world’s most intricate and fascinating traditions, might not be represented.

“Keep looking,” he told me.

When I phoned him the following day after a series of very unrewarding conversations with librarians and cultural attachés, I was desperate.

“I promise I’ll keep looking for ‘Jaat Kahan Ho,’ but you’ve simply got to give me the name of a piece that we can fall back on. What’s the next best thing?

“There’s nothing close,” he insisted. “Keep looking.” The other ethnomusicologists we had been consulting told me to trust him. I started phoning Indian restaurants.

There’s an appliance store on Lexington Avenue in the Twenties in New York City that is owned by an Indian family. Under a card table with a madras cloth thrown over it sits a dusty brown carton with three unopened copies of ‘Jaat Kahan Ho.’`” Why I want to buy all three occasions a great deal of animated speculation on the part of the owners. I fly out of the shop and race uptown to listen to it.

It’s a thrilling piece of music. I phone Brown and find myself saying thank you over and over.

Nearly every challenge was resolved in a similarly heartening way, but nowhere more so than when it came to the eternal see-saw of greed and altruism. When RCA realized that only one song from the final selections was recorded by RCA Victor, they refused to be of further help with producing the record. Sagan and his team had chosen the music without any reference to label or manufacturer, but realized many of the selections came from Columbia Records, so they reached out to the label for help. After the greedy RCA letdown, a much-needed restoration of faith in the human spirit presented itself when the president of Columbia enthusiastically backed the project. Sagan writes with equal parts humor and humility:

It is not as easy as you might think to attract the attention of the president of a major competitive commercial record company on short notice for any enterprise, much less for volunteering corporate resources to send a record to the stars where, even if there are many potential listeners, no impact on corporate profits is likely to be made, at least in the near future. But, eventually, CBS Records, entirely as a public service, secured all the releases, mixed the music, greetings and sounds, and cut the wax masters from which the metal mothers are made. Worldwide releases were obtained in an unprecedentedly brief time. Since there was no way for CBS Records to increase corporate earnings from this project, their cooperation, although in some quarters reluctant, was on the whole truly remarkable.

(One has to wonder whether such selflessness could be expected of today’s increasingly avaricious commercial recording industry.)

The next challenge was of the bureaucratic kind. In addition to the music, Sagan and his team had decided to include a simple greeting in spoken human language. To keep it globally representative, they decided to have a “Hello” in a few dozen languages and figured approaching the United Nations would be the best way to secure the greetings. Sagan had just given an address on space exploration at the UN General Assembly the previous year and had kept in touch with some members of the UN Outer Space Committee, so he used the connection to ask for the greetings. But he was told that the Committee couldn’t itself initiate any “action,” which was only possible for the national delegations. The American Mission to the United Nations was in charge of those, but it would only act if instructed by the State Department, which would only act if so requested by NASA. The Catch-22 was that at that point, NASA hadn’t even formally agreed to include the record on the Voyager, and the State Department needed firm assurance that UN greetings would be included in order to initiate the “action.”

This, in other words, is what happens when a government is a string of middle-managers and bureaucrats whom humanity is supposed to trust for representation.

So Sagan proposed a solution: A recording studio would be set up for a couple of days at the UN Headquarters in New York, and a delegate from each member nation would drop in to record the coveted “Hello” in his or her language. “Her” turned out to be another point of challenge, and one tragically similar today: Sagan wanted an equal number of male and female voices, in order to represent the gender balance of Earth, but was quickly informed that “virtually all the chiefs of delegations were male, and it was unlikely that they would delegate the privilege of saying ‘Hello’ to the stars to anyone else.” (The male ego, indeed, is of cosmic proportions.) Other concerns were raised about what happens if a delegate is not in New York and further bureaucracy ensued. Sagan recounts with amused exasperation:

What is more, the Outer Space committee would have to vote on whether to say “Hello,” and its next meeting was to be in Europe in late June. I explained that even if greetings from the Outer Space Committee were desirable, the launch schedule of Voyager would not permit such a dilatory pace. Could we not, I was then seriously queried, postpone the Voyager launch?

Eventually, they plowed forward with a selection of 55 languages not even remotely representative of Earth. But when the delegates showed up at the UN Headquarters, it quickly became clear that none was satisfied with a simple “Hello” and each wanted to make a speech. Some read poetry from their home nation. Others spoke in Esperanto, the now-defunct “universal language.” The Nigerian delegate included the following endearing sentence:

As you probably know, my country is situated on the west coast of the continent of Africa, a land mass more or less in the shape of a question mark in the center of our planet.

Despite Sagan’s best efforts to keep the project away from the press during the time of the recording, the United Nations, unbeknownst to him, had issued a press release announcing the recording session. The next day, Sagan also discovered that Kurt Waldheim, Secretary General of the United Nations, had made a recording himself. Though the team never requested it, “the speech was so sensitively and gracefully composed, and so appropriate in its sentiments” that they felt they must include it:

As the Secretary General of the United Nations, an organization of 147 member states who represent almost all of the human inhabitants of the planet Earth, I send greetings on behalf of the people of our planet. We step out of our solar system into the universe seeking only peace and friendship, to teach if we are called upon, to be taught if we are fortunate. We know full well that our planet and all its inhabitants are but a small part of the immense universes that surrounds us and it is with humility and hope that we take this step.

Since they were including the Secretary General’s message, Sagan thought it appropriate to at least give the President of the United States the opportunity to contribute one as well. To his surprise and delight, President Jimmy Carter eagerly complied, electing to have his message — one of breathtaking optimism — as text rather than audio:

This is a present from a small distant world, a token of our sounds, our science, our images, our music, our thoughts and our feelings. We are attempting to survive our time so we may live into yours. We hope someday, having solved the problems we face, to join a community of galactic civilizations. This record represents our hope and our determination, and our good will in a vast and awesome universe.

But the most eloquent and moving encapsulation of the spirit of the Golden Record comes from Sagan himself, who extracts from the adventure in musicology a beautiful metaphor for the essence of the project in reflecting on a “charming and powerful tradition” in Javanese gamelan music, which they serendipitously discovered over the course of the research:

There is, it is said, a kind of spirit music in the world, continuously but silently playing. When a gamelan orchestra performs, it is merely making audible the present movement of the music of eternity. Perhaps all of the Voyager record can be viewed similarly — as a local and momentary expression of cosmic discourse, and exchange of greetings and music and information among diverse galactic species that has been in progress for billions of years.

Billions of years from now our sun, then a distended red giant star, will have reduced Earth to a charred cinder. But the Voyager record will still be largely intact, in some other remote region of the Milky Way galaxy, preserving a murmur of an ancient civilization that once flourished — perhaps before moving on to greater deeds and other worlds — on the distant planet Earth.

In the epilogue to Murmurs of Earth, which is an absolutely wonderful and priceless piece of cultural heritage, Sagan reflects on the legacy of the Golden Record:

One thing would be clear about us: no one sends such a message on such a journey, to other worlds and beings, without a positive passion for the future. For all the possible vagaries of the message, they could be sure that we were a species endowed with hope and perseverance, at least a little intelligence, substantial generosity and a palpable zest to make contact with the cosmos.

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