Cosmos
The Series That Changed Everything
In 1980, Carl Sagan stood before the cosmos and asked — on behalf of all of us — who are we, where did we come from, and where are we going? Thirty-five years later, Neil deGrasse Tyson asked again. Both times, the answer was the same: we are star-stuff, privileged to live in a universe that gave rise to awareness of itself.
Carl Sagan's Cosmos: A Personal Voyage
First aired in 1980 on PBS, Cosmos: A Personal Voyage was the most widely watched public television series in American history at the time. Thirteen episodes. 500 million viewers in 60 countries.
Sagan guided viewers through the universe not as a textbook exercise but as a personal journey — his wonder, his humility, and his love for humanity shining in every frame. He stood at the edge of the Cosmic Ocean, looked into the vastness, and came back with gifts: understanding, perspective, and awe.
The series was co-written with his wife Ann Druyan and astronomer Steven Soter. The soundtrack by Vangelis became as iconic as the images.
“The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.”
— Cosmos: A Personal Voyage
“Somewhere, something incredible is waiting to be known.”
— Attributed
“For small creatures such as we, the vastness is bearable only through love.”
— Contact (1985)
Cosmos: A Personal Voyage (1980)
The Shores of the Cosmic Ocean
Sagan explores the cosmos with the Ship of the Imagination, beginning with a cosmic address from the Virgo Supercluster down to Earth.
One Voice in the Cosmic Fugue
The origins of life on Earth, the tree of evolution, and the search for life elsewhere.
The Harmony of the Worlds
Kepler's discovery of planetary orbits and the music of the cosmos.
Heaven and Hell
Cosmic catastrophes — Venus's greenhouse hell, asteroid impacts, and the fate of civilisations.
Blues for a Red Planet
Mars: H.G. Wells, Percival Lowell, and the Viking landers' search for life.
Travellers' Tales
The Voyager missions, the outer solar system, and Dutch explorers of the 17th century.
The Backbone of Night
The Milky Way. Sagan returns to his Brooklyn childhood to explore how we came to understand stars.
Travels in Space and Time
Relativity, time travel, and journeys to the stars.
The Lives of the Stars
Stellar evolution: from nebulae to red giants to supernovae. "We are made of starstuff."
The Edge of Forever
The Big Bang, the expanding universe, and the fate of the cosmos.
The Persistence of Memory
The evolution of the brain, DNA, and the Library of Alexandria.
Encyclopedia Galactica
SETI, the Drake equation, and the possibility of extraterrestrial intelligence.
Who Speaks for Earth?
The nuclear threat, the planetary consciousness, and the future of our civilisation.
“We are part of this universe; we are in this universe, but perhaps more important than both of those facts, is that the universe is in us.”
— Cosmos: A Spacetime Odyssey
“The good thing about science is that it's true whether or not you believe in it.”
— Real Time with Bill Maher
“Not only are we in the universe, the universe is in us. I don't know of any deeper spiritual feeling than what that brings upon me.”
— StarTalk
Neil deGrasse Tyson's Cosmos: A Spacetime Odyssey
Thirty-four years later, Seth MacFarlane produced and Neil deGrasse Tyson hosted a modern Cosmos for a new generation. Premiering on Fox in 2014, it reached 135 million viewers in 181 countries.
The 2014 series used breathtaking CGI to recreate the first moments of the Big Bang, fly through the Oort Cloud, and navigate the interior of a living cell. Tyson's warm, intimate style carried Sagan's torch — honoring the original while pushing into new territory.
A second sequel, Cosmos: Possible Worlds (2020), explored the future of humanity and science.
Concepts That Reshaped Humanity
The Cosmic Calendar
Carl Sagan compressed the 13.8 billion year history of the universe into a single calendar year. The Big Bang is January 1. All of recorded human history — every war, every empire, every invention — occupies the last 10 seconds of December 31. The first humans appear at 11:52 PM. Columbus sails at 11:59:58 PM.
The Pale Blue Dot
At Sagan's urging, Voyager 1 turned its camera toward Earth from 6 billion kilometres away in 1990. Earth is a 0.12-pixel point of light in a sunbeam — the most humbling photograph ever taken. Sagan wrote: "On it, everyone you love, everyone you know, everyone you ever heard of... lived out their lives." It is both devastating and beautiful.
The Ship of the Imagination
In Cosmos, Sagan travels through the universe aboard the Ship of the Imagination — a golden dandelion-seed spacecraft. It is not a real vessel but a metaphor for the human mind's ability to voyage anywhere: through space, through time, into the heart of atoms, back to the beginning of everything. In the 2014 reboot, Neil deGrasse Tyson updated the ship with crystalline aurora.
Billions and Billions
Sagan's phrase — often parodied, always beloved — captured a profound truth: the universe operates at scales incomprehensible to human intuition. There are more stars in the observable universe than grains of sand on all of Earth's beaches. Each star may have planets. Each planet could have moons. The numbers are staggering. And we are part of them.
Sagan's Greatest Words
“The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.”
— Carl Sagan, Cosmos: A Personal Voyage
“Somewhere, something incredible is waiting to be known.”
— Carl Sagan, Attributed
“For small creatures such as we, the vastness is bearable only through love.”
— Carl Sagan, Contact (1985)
“If you wish to make an apple pie from scratch, you must first invent the universe.”
— Carl Sagan, Cosmos, Episode 9
“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.”
— Carl Sagan, Cosmos, Episode 1
“Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live.”
— Carl Sagan, Cosmos: A Personal Voyage
“Extinction is the rule. Survival is the exception.”
— Carl Sagan, The Dragons of Eden
“We are like butterflies who flutter for a day and think it is forever.”
— Carl Sagan, Cosmos: A Personal Voyage
Watch Cosmos
Both series are available to stream. Cosmos: A Personal Voyage (1980) is freely available on many platforms. Cosmos: A Spacetime Odyssey (2014) is on Disney+/National Geographic.