Earth-That-Was

""Earth-That-Was could no longer sustain our numbers, we were so many.""

- Opening Narration, Serenity

The end came and the Earth died. A catastrophe of irrevocable proportions makes the planet unsuitable for large scale civilization—or even life. It can be self inflicted from our abuse, negligence and wars, or external by aliens, astronomical phenomena, or other causes. Usually, a mass exodus occurs where survivors settle on a new planet in a new solar system (though a Terraformed Mars is a popular in-system option), sometimes all over the galaxy, and live on. Perhaps a little wiser, or perhaps doomed to repeat our mistakes. During the course of generations the Earth will leave fact and become legend; a mythical place of endless blue and green and Crystal Spires and Togas. How much of this will be Revisionist History, propaganda, or simple nostalgia varies by setting.

If the location of the Earth is lost, finding the lost human homeworld will become a momentous occasion if not an outright quest. If it was thought to be destroyed, then don't be surprised if it is later revealed to not have been destroyed after all.

For some reason most TV and movies that feature large-scale colonization of other planets (not just mining) require a dead or dying earth as part of the background.

The trope is named for the name for the used up Earth that humanity abandoned in Firefly (As well as Serenity).

This entire Trope may become Harsher in Hindsight in the future. Let's hope not.

See also You Can't Go Home Again, A Long Time Ago in a Galaxy Far Far Away, Insignificant Little Blue Planet, Future Imperfect. A form of Class 6 Apocalypse How.

For the milder version, see Earth That Used to Be Better, where the Earth is still known and inhabited, but is no longer the centre of humanity.

Anime and Manga

 * Eureka Seven
 * Freedom Project: All of the surviving humans live in a colony on the dark side of the moon. Many assumed that the Earth was dead, uninhabitable by nuclear fallout. But a chance encounter by a picture strapped on a toy rocket changed one man's life, and the entire colony as well.
 * Trigun.
 * Saber Marionette J, Terra II
 * In Sol Bianca, the treasure in the first episode turns out to be . In the prequel series Sol Bianca: The Legacy, the main plot is the crew of the eponymous space ship's quest to discover the ultimate fate of Earth.
 * Slowly revealed throughout Vandread. Earth that was is now a giant polluted Eternal Engine where the Moon is forcibly buried within it. Most people left it in colonial ships, several of which settled in space stations or even planets, like Taraak and Mejeiru. Those that remain on Earth.

Comics

 * In the rebooted Rogue Trooper, Earth is abandoned and used exclusively as a resting ground for the Norts' and Southers' new weapons.

Fan Works
"Terra was a dark crown rotting towards the centre of the horrific churning nightmare. It had consumed its sister Venus and Mercury; huge chains and hooked fronds had drawn them into the world and pounded them like clay, into new and dreadful forms. Luna was swallowed whole, before forming a giant lidless eye that wept oceans of pus into the void, which formed wailing pus-devils of nuglitch heritage that consumed themselves within moments."
 * In The Age of Dusk, Earth (and the rest of the Solar System for that matter) has been completely corrupted by Chaos to the point that not even Chaos Marines can survive there.

Film

 * WALL-E - Humanity relocates to ships like the Axiom for 700 years.
 * Lost in Space
 * In Titan A. E., the alien Drej vaporize it before the opening titles.
 * The destination of the quest and the big reveal in The Ice Pirates.
 * Friday the 13th (film) has college students of the future and their professor going on a field trip to a ruined Earth.
 * In Battle for Terra, Earth, Mars and Venus have all been blown up, so humans go to the eponymous planet to find a new home.

Literature

 * In Harry Harrison's Stainless Steel Rat books, Earth was lost even before the Breakdown, and it's unclear whether it was actually called "Earth" or "Dirt". (In a later book, the Rat actually has to go to Earth through a timewarp to warn of its impending doom. So it was destroyed)
 * Isaac Asimov's second Foundation trilogy features this, with an entire book devoted to finding "Earth", humanity's original planet, as well as "Gaia", a separate world populated by a Group Mind. There are plenty of nods to the fourth wall, as characters scoff at this planet which "supposedly had one moon a quarter of its size" and "was in a solar system with another planet that had huge rings."
 * In the later Foundation books, it is revealed that Earth has become an uninhabitable, radioactive wasteland.
 * Happens multiple times in A Deepness in the Sky by Vernor Vinge: The Earth is said to have been recolonized three times after the previous colony could no longer support itself. This also happens to basically every other planet humans colonize, and in Fire Upon the Deep is stated to be the fate of all civilizations in the Slow Zone.
 * Dan Simmons' Hyperion cantos deals with a universe following the "devouring" of Earth by an artificial black hole.
 * This happens during Blue Mars: The Earth is now becoming overpopulated so humanity is forced to move to the other planets.
 * In Lord of Light, human colonists from 'Urath' recreate the Hindu pantheon on another planet.
 * In Richard K. Morgan's Altered Carbon, Earth is still inhabited and the location of the United Nations capital but is severely depopulated after humanity spread out to the stars. It is considered to be culturally stagnant and not a prime travel spot.
 * In The Mote in God's Eye Earth is mostly a wasteland from a hellish final war. The military academy of the successor empires are located there as a reminder to cadets what they're fighting to avoid.
 * In Andre Norton's novel The Beast Master, in the backstory the alien Xik performed a "burnoff" of the surface of the Earth, killing all humans living on it. Luckily the human race had already spread out to other planets in the galaxy.
 * In the process of happening in David Gerrold's War Against the Chtorr series as an alien race is "unterraforming" Earth into their native environment, and plans are being made to relocate to the Moon.
 * Alan Dean Foster's short story Dream Done Green, has Earth lost, and then found to be a complete wasteland.
 * In a Ray Bradbury's The Martian Chronicles, human colonists on Mars watch in disbelief as an accidental nuclear war lights up and completely cleanses the Earth's surface.
 * In the novelizations of Red Dwarf, Earth was eventually abandoned and used as a garbage dump by the rest of the inhabited solar system, before some of the volatile waste exploded and flung it out of the solar system (possibly a reference to Space1999). Lister later crash-lands on it and has a Planet of the Apes Ending moment.
 * The Ring of Ritornel opens with Earth having been wrecked by nuclear bombardment and about to be chucked into a black hole. It has also been renamed Terror.
 * The Remnants series begins with the Earth being hit by an asteroid, and shattering. Five hundred people escape the destruction on the Mayflower spacecraft. Later, the few remaining space-colonists from the Mayflower, awakened from their suspended animation, return to the shattered rock that was Earth.
 * Old Earth still exists in the Dune universe, but is apparently wild and uninhabited, with an ecosystem only just recovering from whatever destroyed it. Its existence is not a secret, but few people visit it. In the prequel series by the author's son, it's revealed that Earth's surface was deliberately nuked by humans in their war against thinking machines, but these books' canonicity is dubious.
 * In Steven Brust's sci-fi work Cowboy Feng's Space Bar and Grille, the staff of the eponymous time- and space-travelling restaurant is trying to find out, among other things, whether or not the Earth is still around and still viable.
 * Steven Gould's Helm begins in a Moon base shortly after Earth was driven into nuclear winter by a war fought with Antimatter weapons.

Live Action TV

 * Kobol, the human homeworld in the new Battlestar Galactica, is revealed to have suffered a nuclear war several millennia in its past. While inhabitable now, it was necessary to leave at the time, and is even "cursed" to exact blood from those who return.
 * What exactly occurred on Kobol is far from clear. With the apparent 'Cycle of Time' the humans and Cylons exist in, it could have been nuclear in origin, as happened to the Colonies as well, but apart from references to a 'Blaze' that pursued the tribes on Kobol and a 'Flood' that wiped out most of humanity specific references have been thin on the ground, likely as the characters have no way of knowing either.
 * Earth 2.
 * "Earth That Was" is referenced many times in the Firefly series, as well the movie Serenity.
 * Although likely to be averted, the Earth is faced with this fate in Crusade, having been contaminated with a slow-acting bioweapon that is expected to destroy all life within 5 years. As the planet is under strict quarantine by other races, off-world humans are effectively cut off from their species' homeworld, as surely as if it was already dead or lost.
 * Word of God on the Drakh Plague is that it would have
 * A surprisingly consistent point of future history in Doctor Who foretells the mass evacuation of Earth around the thirtieth century, to avoid solar flares. The fourth Doctor encounters a wheel-type space station full of sleepers in The Ark In Space, and the Eleventh meets the Starship UK in "The Beast Below", but it comes up in other episodes as well.
 * Later on, we move back in.
 * And later later on, we move back out and leave it as a museum. Until the donations dry up and it finally dies. Of old age.
 * The BBC show Outcasts is set during the early days of the colonisation of a new planet, Carpathia. Bit different to typical examples in that Earth is still inhabited, but people are gradually fleeing it. Exact details of Earth's buggering-up are skated over, but there are passing mentions of a failed climate-change summit in Norway, uprisings in Shanghai, a major earthquake devastating California, etc.
 * The BBC show Outcasts is set during the early days of the colonisation of a new planet, Carpathia. Bit different to typical examples in that Earth is still inhabited, but people are gradually fleeing it. Exact details of Earth's buggering-up are skated over, but there are passing mentions of a failed climate-change summit in Norway, uprisings in Shanghai, a major earthquake devastating California, etc.

Tabletop Games

 * In Traveller at the founding of the Third Imperium, the location of Earth was forgotten.
 * At the same time though, people on Earth remembered it quite well and were doing fine.
 * Twenty Three Hundred AD has a variant in one of the many little alien secrets known only to the GM:
 * Eclipse Phase takes place 10 years after the Fall, when our ever-evolving AI declared war on humanity, destroyed 95% of the population, and vanished. Earth became a forbidden, toxic wasteland. Anyone who dares land on the planet risks encountering the remaining bots, who seem to be interested in stealing cortical stacks (computerized egos) for some reason.
 * The whole point of the Terracide setting (for 6th edition Hero System). Humans had started to spread among the stars after getting their hands on faster-than-light drives, but most of them still had at least sentimental ties to Earth until an unknown force sterilized the entire Sol system.

Video Games

 * Freelancer, where descendants of The Alliance survivors have vague memories of Earth after their ancestors are forced to abandon the Solar System by the forces of the Coalition. Also, Earth is actually destroyed in the original intro for the game, which was cut from the final release.
 * The Alliance actually launched the sleeper ships to escape the eternal war between themselves and the Coalition (which the Coalition was winning).
 * Free Space, where the destruction of the Lucifer seals off Earth from the rest of the galaxy, leaving its fate an opened ended question... Until the second game, where the Ancient's Knossos Device, discovered in Gamma Draconis, offered hope to reestablish contact with Sol. If that would have worked will remain unanswered, however, as the third game was never made...
 * Homeworld follows the spirit of the trope if not the letter. Gameplay concerns the quest of the Kushan people to return to their homeworld, which they were exiled from thousands of years ago after losing a war. Having said that, their home planet is not Earth and the Kushan are not specified to be human. (Though they do speak English.)
 * In Lunar, the humans of Lunar came from the Blue Star, which has become a frozen wasteland recovering from a battle between Althena and Zophar. For bonus points, the Blue Star is a dead ringer for Earth.
 * Earth, or Lost Jerusalem as it's called, is referred to often in Xenosaga. Humans had to leave it because of a mysterious space-time disturbance. Its location has been long lost. At the end of the third game
 * The backstory for its spiritual prequel, Xenogears, is similar. Humans left Earth in AD 2510 due to a space-time anomaly. The only reference to Earth in the game, though, is in the intro, and it is called "the main planet."
 * Sid Meier's Alpha Centauri starts with Humankind leaving the Earth in the UN Unity spaceship towards Planet, near the Alpha Centauri system. . The pitch of the entire game, in fact, is to put this twist to the Spaceship Victory from the Civilization series.
 * It is mentioned that earth in Space Colony is 'no longer economically viable'. Rich people live in space stations, with the poor taking risky lander jobs to harvest resources.
 * In EVE Online, the original introduction explains that humanity left Earth, 'a world outgrown', over 20 000 years ago and started colonizing the entire galaxy. Eventually we found a wormhole leading to what is presumably a completely different galaxy and colonized it as well, before the wormhole collapsed, leaving the inhabitants of this new galaxy cut off from the Milky Way. The very existence of Earth and the Milky Way has been forgotten or turned into myths and legends during the dark age that followed the collapse of the wormhole.
 * It's strongly implied that Pikmin 1 and 2 are set on Earth, possibly After the End.
 * In Outpost 2 the human race has fled from an asteroid-doomed earth. The plot of the game revolves around the earthling colonists of a new planet and how they destroy themselves all over again.
 * In Wild ARMs 3, we find out that not only is Filgaia a Lost Colony of Earth, but that the homeworld was rendered lifeless in wars following some of its people upgrading themselves into battle-crazy "Metal Demons."
 * UFO: Aftermath kicks off the After Blank series with an alien race, the Reticulans, killing off nearly all life on Earth, with only a handful of humans and mutants left on the planet. Although humanity survived, civilization as we know it is over.
 * Another non-Earth example: The D'ni of the Myst series originated on a world called Garternay, which became uninhabitable when its sun began growing dim. Their ancestors fled into a succession of other worlds via their linking books, and have since lost all contact with their abandoned homeworld.

Web Original

 * In Orion's Arm Old Earth was abandoned after the Nanodisaster, because the AI that was designed to protect Earth from Grey Goo decided humanity was the greatest threat to Earth (at least she was considerate enough to make enough ships for us).
 * Afterwards pretty much every mass in the Solar system large enough to support a habitat was colonized. Mars hasn't been fully terraformed due to most of the inhabitants being genetically engineered to survive there, Venus just finished terraforming and has a population of two billion (largest population of any one body in the system), but most of the population is in the Asteroid belt.
 * Of course, after 10,000 years of interstellar expansion Sol has been all but reduced to a tourist trap.
 * Granted, Old Earth is still inhabitable, it's just no one's allowed to live there anymore.
 * It's mentioned that by the "present day" of the setting(approx. 12,000 AD) that the AI had mellowed down somewhat and now allows a limited number of tourists, pilgrims and scientists to a limited number of areas on Earth. She even went through the trouble of preserving or restoring some culturally significant human sites such as Mecca or Cape Canaveral.