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Cosmos
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“Sagan dazzles the mind with the miracle of our survival, framed by the stately galaxies of space.”—Cosmopolitan
THE INSPIRATION FOR THE FOX MINISERIES COSMOS: POSSIBLE WORLDS, HOSTED BY NEIL DEGRASSE TYSON AND STARRING SETH MACFARLANE AND SIR PATRICK STEWART
In clear-eyed prose, Carl Sagan reveals a jewel-like blue world inhabited by a life form that is just beginning to discover its own identity and to venture into the vast ocean of space. Featuring full-color illustrations, Cosmos retraces the fourteen billion years of cosmic evolution that have transformed matter into consciousness, exploring such topics as the origin of life, the human brain, Egyptian hieroglyphics, spacecraft missions, the death of the Sun, the evolution of galaxies, and the forces and individuals who helped shape modern science.
- Reading age8 - 12 years
- Print length432 pages
- LanguageEnglish
- Grade level3 - 7
- Dimensions5.16 x 0.91 x 7.95 inches
- PublisherBallantine Books
- Publication dateDecember 10, 2013
- ISBN-109780345539434
- ISBN-13978-0345539434
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From the Publisher
Editorial Reviews
Review
“Sagan is an astronomer with one eye on the stars, another on history, and a third—his mind’s—on the human condition.”—Newsday
“Brilliant in its scope and provocative in its suggestions . . . shimmers with a sense of wonder.”—The Miami Herald
“Sagan dazzles the mind with the miracle of our survival, framed by the stately galaxies of space.”—Cosmopolitan
“Enticing . . . iridescent . . . imaginatively illustrated.”—The New York Times Book Review
About the Author
His Emmy- and Peabody–winning television series, Cosmos, became the most widely watched series in the history of American public television. The accompanying book, also called Cosmos, is one of the bestselling science books ever published in the English language. Dr. Sagan received the Pulitzer Prize, the Oersted Medal, and many other awards—including twenty honorary degrees from American colleges and universities—for his contributions to science, literature, education, and the preservation of the environment. In their posthumous award to Dr. Sagan of their highest honor, the National Science Foundation declared that his “research transformed planetary science . . . his gifts to mankind were infinite.” Dr. Sagan died on December 20, 1996.
Excerpt. © Reprinted by permission. All rights reserved.
The Shores of the Cosmic Ocean
The first men to be created and formed were called the Sorcerer of Fatal Laughter, the Sorcerer of Night, Unkempt, and the Black Sorcerer . . . They were endowed with intelligence, they succeeded in knowing all that there is in the world. When they looked, instantly they saw all that is around them, and they contemplated in turn the arc of heaven and the round face of the earth . . . [Then the Creator said]: “They know all . . . what shall we do with them now? Let their sight reach only to that which is near; let them see only a little of the face of the earth! . . . Are they not by nature simple creatures of our making? Must they also be gods?”
—The Popol Vuh of the Quiché Maya
The known is finite, the unknown infinite; intellectually we stand on an islet in the midst of an illimitable ocean of inexplicability. Our business in every generation is to reclaim a little more land.
—T. H. Huxley, 1887
The Cosmos is all that is or ever was or ever will be. Our feeblest 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 height. We know we are approaching the greatest of mysteries.
The size and age of the Cosmos are beyond ordinary human understanding. Lost somewhere between immensity and eternity is our tiny planetary home. In a cosmic perspective, most human concerns seem insignificant, even petty. And yet our species is young and curious and brave and shows much promise. In the last few millennia we have made the most astonishing and unexpected discoveries about the Cosmos and our place within it, explorations that are exhilarating to consider. They remind us that humans have evolved to wonder, that understanding is a joy, that knowledge is prerequisite to survival. I believe our future depends on how well we know this Cosmos in which we float like a mote of dust in the morning sky.
Those explorations required skepticism and imagination both. Imagination will often carry us to worlds that never were. But without it, we go nowhere. Skepticism enables us to distinguish fancy from fact, to test our speculations. The Cosmos is rich beyond measure—in elegant facts, in exquisite interrelationships, in the subtle machinery of awe.
The surface of the Earth is the shore of the cosmic ocean. From it we have learned most of what we know. Recently, we have waded a little out to sea, enough to dampen our toes or, at most, wet our ankles. The water seems inviting. The ocean calls. Some part of our being knows this is from where we came. We long to return. These aspirations are not, I think, irreverent, although they may trouble whatever gods may be.
The dimensions of the Cosmos are so large that using familiar units of distance, such as meters or miles, chosen for their utility on Earth, would make little sense. Instead, we measure distance with the speed of light. In one second a beam of light travels 186,000 miles, nearly 300,000 kilometers or seven times around the Earth. In eight minutes it will travel from the Sun to the Earth. We can say the Sun is eight light-minutes away. In a year, it crosses nearly ten trillion kilometers, about six trillion miles, of intervening space. That unit of length, the distance light goes in a year, is called a light-year. It measures not time but distances—enormous distances.
The Earth is a place. It is by no means the only place. It is not even a typical place. No planet or star or galaxy can be typical, because the Cosmos is mostly empty. The only typical place is within the vast, cold, universal vacuum, the everlasting night of intergalactic space, a place so strange and desolate that, by comparison, planets and stars and galaxies seem achingly rare and lovely. If we were randomly inserted into the Cosmos, the chance that we would find ourselves on or near a planet would be less than one in a billion trillion trillion (1033, a one followed by 33 zeroes). In everyday life such odds are called compelling. Worlds are precious.
From an intergalactic vantage point we would see, strewn like sea froth on the waves of space, innumerable faint, wispy tendrils of light. These are the galaxies. Some are solitary wanderers; most inhabit communal clusters, huddling together, drifting endlessly in the great cosmic dark. Before us is the Cosmos on the grandest scale we know. We are in the realm of the nebulae, eight billion light-years from Earth, halfway to the edge of the known universe.
A galaxy is composed of gas and dust and stars—billions upon billions of stars. Every star may be a sun to someone. Within a galaxy are stars and worlds and, it may be, a proliferation of living things and intelligent beings and spacefaring civilizations. But from afar, a galaxy reminds me more of a collection of lovely found objects—seashells, perhaps, or corals, the productions of Nature laboring for aeons in the cosmic ocean.
There are some hundred billion (1011) galaxies, each with, on the average, a hundred billion stars. In all the galaxies, there are perhaps as many planets as stars, 1011 × 1011 = 1022, ten billion trillion. In the face of such overpowering numbers, what is the likelihood that only one ordinary star, the Sun, is accompanied by an inhabited planet? Why should we, tucked away in some forgotten corner of the Cosmos, be so fortunate? To me, it seems far more likely that the universe is brimming over with life. But we humans do not yet know. We are just beginning our explorations. From eight billion light-years away we are hard pressed to find even the cluster in which our Milky Way Galaxy is embedded, much less the Sun or the Earth. The only planet we are sure is inhabited is a tiny speck of rock and metal, shining feebly by reflected sunlight, and at this distance utterly lost.
But presently our journey takes us to what astronomers on Earth like to call the Local Group of galaxies. Several million light-years across, it is composed of some twenty constituent galaxies. It is a sparse and obscure and unpretentious cluster. One of these galaxies is M31, seen from the Earth in the constellation Andromeda. Like other spiral galaxies, it is a huge pinwheel of stars, gas and dust. M31 has two small satellites, dwarf elliptical galaxies bound to it by gravity, by the identical law of physics that tends to keep me in my chair. The laws of nature are the same throughout the Cosmos. We are now two million light-years from home.
Beyond M31 is another, very similar galaxy, our own, its spiral arms turning slowly, once every quarter billion years. Now, forty thousand light-years from home, we find ourselves falling toward the massive center of the Milky Way. But if we wish to find the Earth, we must redirect our course to the remote outskirts of the Galaxy, to an obscure locale near the edge of a distant spiral arm.
Our overwhelming impression, even between the spiral arms, is of stars streaming by us—a vast array of exquisitely self-luminous stars, some as flimsy as a soap bubble and so large that they could contain ten thousand Suns or a trillion Earths; others the size of a small town and a hundred trillion times denser than lead. Some stars are solitary, like the Sun. Most have companions. Systems are commonly double, two stars orbiting one another. But there is a continuous gradation from triple systems through loose clusters of a few dozen stars to the great globular clusters, resplendent with a million suns. Some double stars are so close that they touch, and starstuff flows between them. Most are as separated as Jupiter is from the Sun. Some stars, the supernovae, are as bright as the entire galaxy that contains them; others, the black holes, are invisible from a few kilometers away. Some shine with a constant brightness; others flicker uncertainly or blink with an unfaltering rhythm. Some rotate in stately elegance; others spin so feverishly that they distort themselves to oblateness. Most shine mainly in visible and infrared light; others are also brilliant sources of X-rays or radio waves. Blue stars are hot and young; yellow stars, conventional and middle-aged; red stars, often elderly and dying; and small white or black stars are in the final throes of death. The Milky Way contains some 400 billion stars of all sorts moving with a complex and orderly grace. Of all the stars, the inhabitants of Earth know close-up, so far, but one.
Each star system is an island in space, quarantined from its neighbors by the light-years. I can imagine creatures evolving into glimmerings of knowledge on innumerable worlds, every one of them assuming at first their puny planet and paltry few suns to be all that is. We grow up in isolation. Only slowly do we teach ourselves the Cosmos.
Some stars may be surrounded by millions of lifeless and rocky worldlets, planetary systems frozen at some early stage in their evolution. Perhaps many stars have planetary systems rather like our own: at the periphery, great gaseous ringed planets and icy moons, and nearer to the center, small, warm, blue-white, cloud-covered worlds. On some, intelligent life may have evolved, reworking the planetary surface in some massive engineering enterprise. These are our brothers and sisters in the Cosmos. Are they very different from us? What is their form, biochemistry, neurobiology, history, politics, science, technology, art, music, religion, philosophy? Perhaps someday we will know them.
We have now reached our own backyard, a light-year from Earth. Surrounding our Sun is a spherical swarm of giant snowballs composed of ice and rock and organic molecules: the cometary nuclei. Every now and then a passing star gives a tiny gravitational tug, and one of them obligingly careens into the inner solar system. There the Sun heats it, the ice is vaporized, and a lovely cometary tail develops.
We approach the planets of our system, largish worlds, captives of the Sun, gravitationally constrained to follow nearly circular orbits, heated mainly by sunlight. Pluto, covered with methane ice and accompanied by its solitary giant moon Charon, is illuminated by a distant Sun, which appears as no more than a bright point of light in a pitch-black sky. The giant gas worlds, Neptune, Uranus, Saturn—the jewel of the solar system—and Jupiter all have an entourage of icy moons. Interior to the region of gassy planets and orbiting icebergs are the warm, rocky provinces of the inner solar system. There is, for example, the red planet Mars, with soaring volcanoes, great rift valleys, enormous planet-wide sandstorms, and, just possibly, some simple forms of life. All the planets orbit the Sun, the nearest star, an inferno of hydrogen and helium gas engaged in thermonuclear reactions, flooding the solar system with light.
Finally, at the end of all our wanderings, we return to our tiny, fragile, blue-white world, lost in a cosmic ocean vast beyond our most courageous imaginings. It is a world among an immensity of others. It may be significant only for us. The Earth is our home, our parent. Our kind of life arose and evolved here. The human species is coming of age here. It is on this world that we developed our passion for exploring the Cosmos, and it is here that we are, in some pain and with no guarantees, working out our destiny.
Welcome to the planet Earth—a place of blue nitrogen skies, oceans of liquid water, cool forests and soft meadows, a world positively rippling with life. In the cosmic perspective it is, as I have said, poignantly beautiful and rare; but it is also, for the moment, unique. In all our journeying through space and time, it is, so far, the only world on which we know with certainty that the matter of the Cosmos has become alive and aware. There must be many such worlds scattered through space, but our search for them begins here, with the accumulated wisdom of the men and women of our species, garnered at great cost over a million years. We are privileged to live among brilliant and passionately inquisitive people, and in a time when the search for knowledge is generally prized. Human beings, born ultimately of the stars and now for a while inhabiting a world called Earth, have begun their long voyage home.
The discovery that the Earth is a little world was made, as so many important human discoveries were, in the ancient Near East, in a time some humans call the third century b.c., in the greatest metropolis of the age, the Egyptian city of Alexandria. Here there lived a man named Eratosthenes. One of his envious contemporaries called him “Beta,” the second letter of the Greek alphabet, because, he said, Eratosthenes was second best in the world in everything. But it seems clear that in almost everything Eratosthenes was “Alpha.” He was an astronomer, historian, geographer, philosopher, poet, theater critic and mathematician. The titles of the books he wrote range from Astronomy to On Freedom from Pain. He was also the director of the great library of Alexandria, where one day he read in a papyrus book that in the southern frontier outpost of Syene, near the first cataract of the Nile, at noon on June 21 vertical sticks cast no shadows. On the summer solstice, the longest day of the year, as the hours crept toward midday, the shadows of temple columns grew shorter. At noon, they were gone. A reflection of the Sun could then be seen in the water at the bottom of a deep well. The Sun was directly overhead.
It was an observation that someone else might easily have ignored. Sticks, shadows, reflections in wells, the position of the Sun—of what possible importance could such simple everyday matters be? But Eratosthenes was a scientist, and his musings on these commonplaces changed the world; in a way, they made the world. Eratosthenes had the presence of mind to do an experiment, actually to observe whether in Alexandria vertical sticks cast shadows near noon on June 21. And, he discovered, sticks do.
Eratosthenes asked himself how, at the same moment, a stick in Syene could cast no shadow and a stick in Alexandria, far to the north, could cast a pronounced shadow. Consider a map of ancient Egypt with two vertical sticks of equal length, one stuck in Alexandria, the other in Syene. Suppose that, at a certain moment, each stick casts no shadow at all. This is perfectly easy to understand—provided the Earth is flat. The Sun would then be directly overhead. If the two sticks cast shadows of equal length, that also would make sense on a flat Earth: the Sun’s rays would then be inclined at the same angle to the two sticks. But how could it be that at the same instant there was no shadow at Syene and a substantial shadow at Alexandria?
Product details
- ASIN : 0345539435
- Publisher : Ballantine Books
- Publication date : December 10, 2013
- Language : English
- Print length : 432 pages
- ISBN-10 : 9780345539434
- ISBN-13 : 978-0345539434
- Item Weight : 2.31 pounds
- Reading age : 8 - 12 years
- Dimensions : 5.16 x 0.91 x 7.95 inches
- Grade level : 3 - 7
- Best Sellers Rank: #2,189 in Books (See Top 100 in Books)
- #1 in Scientific Reference
- #2 in Astronomy (Books)
- #2 in Cosmology (Books)
- Customer Reviews:
About the authors

Award winning writer/producer/director Ann Druyan was the Creative Director of NASA’s Voyager Interstellar Message. With her late husband, Carl Sagan, Druyan was co-writer of six New York Times best-sellers, including “Comet,” “Shadows of Forgotten Ancestors,” “The Demon Haunted World,” “Billions & Billions” and “The Varieties of Scientific Experience.” She was co-writer of the 1980 television series “Cosmos: A Personal Voyage.” Druyan was co-creator and co-producer of the feature film “Contact,” starring Jodie Foster and directed by Bob Zemeckis. She was the lead executive producer (for which she won the Producer’s Guild and Peabody Awards), co-writer (for which she won the 2014 Emmy) as well as one of three directors of Cosmos: A SpaceTime Odyssey, which was the largest global roll out of a series in television history and has now been seen in 181 countries.

THE LATEST BOOK - adapted from the Prologue
I'm Neil deGrasse Tyson, an astrophysicist and servant of those who are cosmically curious. My latest book is "Take Me To Your Leader: Perspectives on Your first Alien Encounter." When a space Alien demands, “Take me to your leader!” what should you do? We presume it wants to meet the person in charge: The President. The Prime Minister. The Monarch. The Pope. Eavesdropping on our cultural norms, the Aliens might instead conclude that pop culture icons were in charge, such as Oprah, or Taylor Swift. Think of "Take Me To Your Leader" as a book of etiquette and scientifically infused insights for that first encounter, from an astrophysicist who wants to meet the Aliens as badly as you do.
BRIEF BIOGRAPHY
Neil deGrasse Tyson was born in New York City the same week NASA was founded. His interest in the universe traces back to age 9, after a first visit to the Hayden Planetarium of the American Museum of Natural History. He was educated in the public schools of New York City through his graduation from the Bronx High School of Science. And after an BA in Physics from Harvard and a PhD in Astrophysics from Columbia and a Postdoctoral research fellowship at Princeton, Tyson became the Frederick P. Rose Director of the Hayden Planetarium, where he has served since 1996.

Discover more of the author’s books, see similar authors, read book recommendations and more.

Carl Sagan was Professor of Astronomy and Space Sciences and Director of the Laboratory for Planetary Studies at Cornell University. He played a leading role in the Mariner, Viking, and Voyager spacecraft expeditions to the planets, for which he received the NASA medals for Exceptional Scientific Achievement. Dr. Sagan received the Pulitzer Prize and the highest awards of both the National Academy of Sciences and the National Science Foundation, and many other awards, for his contributions to science, literature, education, and the preservation of the environment. His book Cosmos (accompanying his Emmy- and Peabody Award-winning television series of the same name) was the bestselling science book ever published in the English language, and his bestselling novel, Contact, was turned into a major motion picture.
Photo by NASA/JPL [Public domain], via Wikimedia Commons.
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Top reviews from the United States
- 5 out of 5 stars
Should be mandated reading
Reviewed in the United States on August 30, 2012You don't expect someone whose obvious forte is mathematics and science to be a fantastic writer to boot, but Carl Sagan writes beautifully indeed. I'll try to make this review as useful as possible. The subject matter varies between chapters, with some of them more scientifically dense (and therefore fascinating) and others are historically informative. Here is a basic topic of chapters (not in order):
-A chapter putting into perspective how little we know and how many wondrous things there are yet to discover about our existence
-A chapter on Venus, among other planets and bodies, within our solar system along with musings on why it is habitable or not
-A chapter on Mars and everything it has meant to us and was discovered to be like
-A chapter devoted to the very first scientific awakening of our race
-A chapter that addresses the likelihood of communication with other intelligent life
These are just a couple of the chapters. You'll learn about how, scientist by scientist, we amassed the information and knowledge we have to date, and the magnitude and elegance of each of their respective contributions. Carl will teach you about the laws of the universe that everything in it obeys You'll learn not just elementary facts about the planets in our solar system, but the "how" and "why" behind their characteristics and attributes. You will be brought to edge of human knowledge and made to look out into the vast wealth of information left to acquire. You will finish this book with a sense of profound curiosity, deep respect, tremendous awe, and quiet humility.
Every chapter has a very nice structure to it, following the same basic template: Ask a question or pose a problem, explain, conclude with a look forward. He never leaves anything unfinished or any stone unturned, so you never get the sense of abrupt subject change. Each chapter is intended to be treated as individual, and so it can be likened to a sentence, ending definitively and conclusively with a period. The reviewer that said this is disorganized is being too obsessive and completely missing the point. The book itself is more of a collection of thought-provoking topics than it is some sort of fictional story meant to "flow". If this is what you are seeking, I suggest going back to fiction. It honestly makes the book easier to read the way Sagan structured it.
If you are a religious person and are nervous that his atheism might somehow offend you, I assure you that he is never arrogant, confrontational, or mocking. He is simply a humanist, and is looking only to impart upon his audience a true understanding of how beautiful our existence and the science behind it is. Not only does he deliver facts, but he successfully enlightens you. I can honestly say this is the most profoundly educational book I have ever read. I have never learned so much in just one book. I feel not just more educated and knowledgeable, but wiser as a human. He only tries to dispel the hold that superstition has had and the darkness of ignorance that has haunted us throughout our history. He leaves you to believe whatever you want to believe, while making sure you never make the mistake of attributing truly scientific processes to magic. You may even find a better reason to feel spiritually in touch with our human identity and the meaning of life. That's all up to you how you interpret this, but this is beautiful education and enlightenment, not an offensive attack on anything or anyone.
He is a beautiful writer and sometimes, I was blown away by the flow of his words. There were some sentences that were as musical and intricately beautiful as symphony. He is truly a loss to our race, both for his knowledge and his perspective. His is the hand that waves away the smoke, clearing that which is otherwise in plain sight for everyone to see. Do recommend. Would make it compulsory reading if I was a dictator.
49 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
A true pleasure and eye-opener
Reviewed in the United States on January 7, 2017What a privilege and joy it was to have read this book. I made my way through it rather slowly because it was so packed full of historical anecdotes, scientific findings, and thought-provoking insights that I needed a break every chapter or so to let ideas mentally sink in. In 13 chapters, Dr Sagan gives us a glimpse into all scales of space and time. From the Big Bang to the formation of the stars and the Earth, through the painstaking evolutionary process that resulted in human beings, to millenia beyond our time where interstellar travel may be a viable means of commute. From quarks to complex molecules to planets, supernovae and black holes, to the idea of an infinite hierarchy of universes, all nested within one another.
This book is far beyond an ordinary astronomy general interest read. Its contents incorporate genetics, ancient history, chemical biology, sociology, religion, human psychology and philosophy... Dr Sagan weaves these realms together in the context of the Cosmos, and raises intriguing questions about hypothetical alternate turn of events as well as where we (humankind) go from here. He pays homage to the brilliant minds whose work and courage has contributed to our current technical capabilities. From Erastosthenes' astute calculation of the Earth's circumference, to Kepler’s observations, to Einstein's special theory of relativity (and those in between: Huygens, Brahe, Newton, Champollion etc.), Sagan not only highlights their contribution, but discusses the societal circumstances that these individuals found themselves in. In doing so, he invokes a scrutiny of our current societal climate and behaviors. Are we doing our best to build and maintain a society that values the pursuit of knowledge over one that may eventually crumble under self-destructive greed? Are we investing an adequate amount of resources (both monetary and intellect) on constructive, self-preserving causes? Sagan goes as far as to compare government spendings on military weapons with scientific research funding, and demonstrates how far will have still to go before our loyalties are united not just within nation-states, but as a species of Planet Earth.
Dr Sagan’s intrigues are not limited to Western ways of thinking. Instead, he pays deep respect to the cultures, achievements, and creation myths around the world - this was done through anecdotes from ancient Chinese, Egyptian, and Indian history as well as various tribal accounts. By doing so, he demonstrates that human intrigue has more in common than we may first assume. The early civilizations around the Earth, long before they knew of one another, independently devised theories about how we came to be based on their observations of the heavens. These were passed on to their descendants through subsequent generations ultimately resulting in what we may believe or know of today.
I wonder what Dr Sagan would have thought about the state of the world today… recent election results, SpaceX, virtual reality, artificial intelligence/machine learning, Kepler missions, CRISPR-Cas9 gene editing, instability in the Middle East, the Higgs Boson… My guess is that he would simultaneously be alarmed that we are STILL arguing whether or not climate change is a problem, and amazed at our technological achievements with the internet and a legitimate goal to visit Mars. I would without a doubt recommend this book to everyone. A scientific degree is not necessary to fully appreciate the lesson and message that this book conveys. Dr Sagan’s literary style is not only comprehensible but so finely depicts his deep passion for the sciences that it is almost poetic. After having read the book, one could truly dwell on what we can do to unify ourselves as citizens of Planet Earth, with a mutual interest of survival, pursuit of interplanetary/interstellar travel and constant discovery of what our universe has to offer.
166 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
Great find
Reviewed in the United States on June 11, 2026Great read. Nice cover. Book binding in tact. No writing on pages. Few bent pages.
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Conclusion: although dated, this book is still worth reading!
Reviewed in the United States on September 20, 2016I read this book when it came out in 1980, in hard cover version. I was a 14 year-old-boy and I think I reread Cosmos, partly because of sentimental reasons I remember a lot of nice photo's and clear graphics. The Kindle version I just finished only has a couple of simple graphics but I knew that before I bought the Kindle version ... so no complaining.
The book is more than 30 years old and since then science did not stop. The first space shuttle was launched in 1981, the last one in 2011. Since 2012 you can make your "personal spaceflight" (development of Space tourism). In 1986 the Voyager 2 was launched to explore Uranus and Neptune. and in 2006 and 2007 the space probes New Horizons and Dawn left Earth, the first to explore Pluto and one or more of the other Kuiper belt objects and the later with the mission of studying two of the three known protoplanets of the asteroid belt, Vesta and Ceres.
Among others space probes where launched by the Russians (especially to Venus), Japan (to the Comet Halley flyby), and in 1966 the U.S. Mars Pathfinder, a Mars lander with the first planetary rover took off. Also the European Union started space exploration with the Venus Express in 2005. In the mean while, the Hubble Space Telescope (HST) did some amazing research. The telescope is operating as of 2016, and could last until 2030–2040. Its scientific successor, the James Webb Space Telescope (JWST), is scheduled for launch in 2018.
So without doubt Carl Sagan's book Cosmos is dated but is still worth reading. Some quotes are still reveling:
- "The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff."
- "The study of the galaxies reveals a universal order and beauty. It also shows us chaotic violence on a scale hitherto undreamed of. That we live in a universe which permits life is remarkable. That we live in one which destroys galaxies and stars and worlds is also remarkable. The universe seems neither benign nor hostile, merely indifferent to the concerns of such puny creatures as we."
- "We humans, as a species, are interested in communication with extraterrestrial intelligence. Would not a good beginning be improved communication with terrestrial intelligence, with other human beings of different cultures and languages, with the great apes, with the dolphins, but particularly with those intelligent masters of the deep, the great whales?"
Conclusion: although dated, this book is still worth reading.
21 people found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
The Whole Shebang---and then some!
Reviewed in the United States on November 3, 2012This incredible book was written in 1980 to coincide with the PBS mini-series by the same name. With cutting edge science (in 1980) and a keen grasp of history Sagan takes the reader on a whirlwind tour of the universe and our own past. From "The Shores of the Cosmic Ocean" to the "Edge of Forever" Sagan's writing tackles some strange and complex subjects in a clear, straight forward manner. The Tunguska Event, the "Canali" of Mars, impact craters and the mythology of our sister planets are just a few of the many things that are covered in Cosmos. While there have been many advances in the field of Astronomy over the intervening years since 1980 that shouldn't make much of a difference to the general reader. Indeed, it will introduce you to the wonders of the solar system, the galaxy, the universe and beyond. It may even encourage you to read something on astronomy that's a little more up to date. Some of the more recent books out there will take you to places that Sagan only hinted at in Cosmos like the multiverse and the rovers on Mars. Besides astronomy Sagan also delves into the history of science and the people that made it happen. Science Fiction is also touched on, authors such as; Edger Rice Burroughs and H G Wells round out the discussion. This is The Classic science book so strap yourself in and enjoy the ride.
I had no technical problems with this Kindle edition but, as noted by other reviewers, the stunning color art work is missing. This may be an oversight or a copyright issue, it's hard to tell. But that's up to the publishing company and Kindle to sort out and correct. Maybe that's why the price is so low. I guess there's no substitute for having the original hard bound edition. The fact of missing pictures does not in any way diminish the overall impact of the text and, to me, that's the bottom line.
For more on the author and his works see Raymond Shubinski's interesting article "Remembering Carl Sagan and Cosmos" in the July 2013 issue of Astronomy.
LastRanger
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Life explained clearly and beautifully
Reviewed in the United States on April 9, 2014If you are interested in reading about life - nearly every aspect of it - then you should probably pick up this book. Although it is not lengthy page-wise, the information and the concepts introduced are so dense and thought-provoking that it feels like this book contains more than it's deceptive page count reveals. Carl Sagan weaves in so much history, science, astronomy, and philosophy, while keeping a very readable writing style, and making the concepts as clear and lucid as possible. I do think having some basic science knowledge is helpful though, because there aren't many illustrations to help visualize some of the more esoteric concepts.
I love science, but I think I was most excited by all the instances in this book where Carl Sagan talks about historical precedent and the evolution of our thinking in various matters. Religion is touched on in a very respectful way, and I feel like the point which is made on trying to understand God through our physical surroundings instead of stories written so many years in the past is particularly valid given the scope and awe of the universe. There were also many moments when I was reading that I just had to stop and digest after coming across a particularly eye-opening bit of information. I just loved learning so much through this book. Towards the end, the book starts to delve more into theoretical ideas and personal thoughts which, while interesting, was not as compelling a read for me, but of course this is such a small issue compared to the overall achievement in the breadth and scope of this book.
Even though this is a non-fiction book heavily steeped in science, this was a truly exciting read and full of information and ideas that everyone can find benefit from. And I've never had must interest in astronomy, but this book has given me such an interesting perspective that I feel like visiting the nearest observatory!
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Good read
Reviewed in the United States on February 24, 2026I love this book that I decided to own it instead of borrowing from the local library.
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This book should be required reading for anyone living on Earth.
Reviewed in the United States on November 5, 2008I cannot imagine reading this and not being moved. I cannot imagine reading this and not being blown away by the wonder of existence and the wonder of the universe as you do so. I cannot imagine reading this and not absolutely loving Carl Sagan by the time you reach the last page.
COSMOS is an amazing read. At times, it may feel a little densely packed, but that's only because its every single word is important, is loaded with meaning. In 13 gorgeously color-illustrated chapters, Sagan takes his readers on an absolutely amazing tour through the entire history and geography of the universe, with exciting stops along the way--in Earth's distant history, on Mars, in ancient Alexandria, to the edge of the universe, to the insides of the stars, and the insides of our minds.
Over and over again, reading this, my jaw dropped in awe and amazement. I found myself quoting passages of it to whoever I was near. I found myself with a pencil in hand, marking every other line.
The perspective that Sagan gives to our lives on Earth, the wonder he imbues the pursuit of knowledge with, and importance he conveys regarding humankind's role as Earth's most intelligent and potentially destructive species feels holy, and needed. The whole books feel that way.
What more can I say? I love this book. I wanted to hang up a framed picture of its author by the time I was done with it. I wanted to buy copies for everyone I know. I wanted to watch the DVDs of its companion series, and I still do--it's nice in that way, in that you can recommend it to anyone, as a book or as a show, even to people who don't like to read. If you buy the book though, be sure not to get the mass market paperback version, as that doesn't have all the illustrations. Get it in hardcover, as you'll almost certainly want to keep it for further re-reading, and for your collection.
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Top reviews from other countries
Tsutomu Odani5 out of 5 starsA must read for every thinking person on the earth!
Reviewed in Japan on November 7, 2020Every one concerned about the current and future human being’s survival needs to read!
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lamis sobh1 out of 5 starsthe book cover is damag
Reviewed in Saudi Arabia on October 19, 2022I do bot like the cook cover is damde
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Sergio Vela5 out of 5 starsExcellent book about science and the cosmos.
Reviewed in Spain on October 31, 2025A classic. A book that is worth having in paper for this price.
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Wlm Boom3 out of 5 starsGoed boek
Reviewed in the Netherlands on January 27, 2026Kreukel in kaft
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Fahad2 out of 5 starsBack cover was torn
Reviewed in the United Arab Emirates on October 30, 2025The back cover of the book was torn from the corner but all the pages were intact
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