History Main / AllPlanetsAreEarthLike

24th Nov '16 3:07:41 AM Morgenthaler
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* Initially avoided in MadeleineLEngle's ''Literature/AWrinkleInTime'', where the characters visit in quick succession a ''two-dimensional'' planet and a planet where the air has a slightly different oxygenation level; later planets are sufficiently Earthlike for no problems to occur (and Camazotz even has Earthlike trees).

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* Initially avoided in MadeleineLEngle's Creator/MadeleineLEngle's ''Literature/AWrinkleInTime'', where the characters visit in quick succession a ''two-dimensional'' planet and a planet where the air has a slightly different oxygenation level; later planets are sufficiently Earthlike for no problems to occur (and Camazotz even has Earthlike trees).



* Played straight in Creator/HBeamPiper's ''Literature/LittleFuzzy'' series, with the extremely Earth-like planet Zarathustra. Subverted in his work ''UllerUprising'', with the planets Uller (Breathable air and tolerable gravity, but silicon-based native life) and [[MeaningfulName Nifflheim]] (hideously poisonous mining planet).

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* Played straight in Creator/HBeamPiper's ''Literature/LittleFuzzy'' series, with the extremely Earth-like planet Zarathustra. Subverted in his work ''UllerUprising'', ''Literature/UllerUprising'', with the planets Uller (Breathable air and tolerable gravity, but silicon-based native life) and [[MeaningfulName Nifflheim]] (hideously poisonous mining planet).
30th Oct '16 2:25:42 PM Discar
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* ''Literature/TheCosmere'': All planets we've seen can support human life. While most of these planets have god-like [[PiecesOfGod Shards]] who either explicitly or implicitly terraformed the planet, there are also worlds without Shards that are still very close to Earth normal. Per WordOfGod, [[Franchise/{{Mistborn}} Scadrial]] is a direct parallel to Earth, with identical time, environment, gravity, ecology (not counting when it was [[AfterTheEnd the World of Ash]]), and even [[FantasyCounterpartCulture culture]]. On the other hand, ''Literature/TheStormlightArchive'''s Roshar is only able to support human life in the most liberal sense of the word. Years are five hundred days long (but the days are shorter so the year only ends up ten percent longer than Earth normal), gravity is seventy percent of normal, oxygen content in the atmosphere is a bit higher, most of the animals are some variety of arthropod, the plants look like things you'd find underwater, and world-breaking highstorms blow from east to west every few days.
30th Oct '16 9:23:46 AM nombretomado
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* ''{{GURPS}} Space'' arguably goes [[http://irregularwebcomic.net/94.html too far in the other direction]]. Enough that the fourth edition had you deciding whether you wanted an Earthlike planet to start with and then designing the physical characteristics with that in mind. The main alternatives being gas giant, rocky moon/asteroid, ice moon, or toxic terrestrial.
* Justified in the ''{{Traveller}}'' RPG, where Earth life (including TransplantedHumans and Uplifted canines) were spread by the [[{{Precursors}} Ancients]].

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* ''{{GURPS}} ''{{TabletopGame/GURPS}} Space'' arguably goes [[http://irregularwebcomic.net/94.html too far in the other direction]]. Enough that the fourth edition had you deciding whether you wanted an Earthlike planet to start with and then designing the physical characteristics with that in mind. The main alternatives being gas giant, rocky moon/asteroid, ice moon, or toxic terrestrial.
* Justified in the ''{{Traveller}}'' ''{{TabletopGame/Traveller}}'' RPG, where Earth life (including TransplantedHumans and Uplifted canines) were spread by the [[{{Precursors}} Ancients]].
8th Oct '16 1:33:01 PM Nippertipper
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That science fiction trope where planets fall into two categories: Earth-like (solid, with a human-breathable atmosphere and the same gravity, even if completely barren), and gas giants. And often, the gas giants have Earth-like moons. Even the most inhospitable of {{Single Biome Planet}}s are not immune.

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That science fiction trope where planets fall into two categories: Earth-like (solid, with a human-breathable atmosphere and the same gravity, even if completely barren), and gas giants. And often, many of the gas giants have Earth-like moons. Even the most inhospitable of {{Single Biome Planet}}s are not immune.
2nd Sep '16 3:01:59 AM onyhow
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* {{Averted|Trope}} in ''VideoGame/NoMansSky''--many of the planets players will encounter will be lifeless rocks, with only 10% of them being viable, earthlike worlds; and of that only 10% of ''those'' worlds will have flourishing "garden"-type ecologies. That doesn't necessarily mean that the non-earthlike worlds (or barely-earthlike worlds) will be useless, though: a barren world may have more valuable resources in it than an earthlike world.

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* {{Averted|Trope}} in ''VideoGame/NoMansSky''--many of the ''VideoGame/NoMansSky''. While there's very few planets players will encounter will be lifeless rocks, with only 10% of them being viable, earthlike worlds; and of that only 10% are completely devoid of ''those'' worlds will life, not many planets have flourishing "garden"-type ecologies. That doesn't necessarily mean ecology that the non-earthlike worlds (or barely-earthlike worlds) will can be useless, though: a barren world may have more valuable resources in it than an earthlike world.described as Earth-like either.
30th Aug '16 12:15:44 PM Morgenthaler
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* Subverted in ''[[{{Earth 2150}} Earth 2160]]''. The game takes place on a number of celestial bodies in the Solar System and around the nearby stars (one mission takes place on a very large ''comet''), but of these, only 2 planets are actually suited for human habitation. One of the is a desert planet reminiscent of the one in ''Film/{{Stargate}}'' (complete with ancient [[{{Precursors}} alien]] pyramids), while the other is a ''very'' Earthlike planet called Eden. The main characters are visibly surprised when they see a video from the surface, and some even suspect that it's actually old Earth footage.

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* Subverted in ''[[{{Earth ''[[VideoGame/{{Earth 2150}} Earth 2160]]''. The game takes place on a number of celestial bodies in the Solar System and around the nearby stars (one mission takes place on a very large ''comet''), but of these, only 2 planets are actually suited for human habitation. One of the is a desert planet reminiscent of the one in ''Film/{{Stargate}}'' (complete with ancient [[{{Precursors}} alien]] pyramids), while the other is a ''very'' Earthlike planet called Eden. The main characters are visibly surprised when they see a video from the surface, and some even suspect that it's actually old Earth footage.
12th Aug '16 4:45:42 AM Morgenthaler
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** They actually played with/subverted this trope in the teaser for a Season 9 episode. Most of the alien worlds, as stated, look almost exactly like the woods around {{Vancouver}} so the audience wouldn't be too surprised to have an episode open with a [[{{Mook}} Jaffa]] running through one of these alien forests... until he gets hit by a truck and you find out that he was on EarthAllAlong.

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** They actually played with/subverted this trope in the teaser for a Season 9 episode. Most of the alien worlds, as stated, look almost exactly like the woods around {{Vancouver}} UsefulNotes/{{Vancouver}} so the audience wouldn't be too surprised to have an episode open with a [[{{Mook}} Jaffa]] running through one of these alien forests... until he gets hit by a truck and you find out that he was on EarthAllAlong.
1st Aug '16 10:15:52 AM UmbrellasWereAwesome
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* Subverted in the ''Franchise/{{Halo}}'' series. It's revealed in the expanded universe that it often takes ''decades'' of terraforming to make a colony world suitable for human use. There's also an outright aversion in the Grunt homeworld, which has a methane atmosphere. That said, there are plenty of planets that play this fairly straight too, even some of the ones with multiple moons/suns.

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* Subverted in the ''Franchise/{{Halo}}'' series. It's revealed in the expanded universe that it often takes ''decades'' of terraforming to make a colony world suitable for human use. There's also an outright aversion in the Grunt homeworld, which has a methane atmosphere. That said, there are plenty of planets that play this fairly straight too, even some of the ones with multiple moons/suns.if they have an extra moon/sun or two.
1st Aug '16 10:15:21 AM UmbrellasWereAwesome
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* Subverted in the ''Franchise/{{Halo}}'' series. It's revealed in the EU that it takes ''decades'' of terraforming to make a colony world suitable for human use.
** Also the Grunts evolved on a planet with a methane atmosphere.

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* Subverted in the ''Franchise/{{Halo}}'' series. It's revealed in the EU expanded universe that it often takes ''decades'' of terraforming to make a colony world suitable for human use.
** Also
use. There's also an outright aversion in the Grunts evolved on a planet with Grunt homeworld, which has a methane atmosphere.atmosphere. That said, there are plenty of planets that play this fairly straight too, even some of the ones with multiple moons/suns.
16th Jul '16 12:29:43 PM nombretomado
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* Subverted in the ''CoDominium'' universe. Life-bearing worlds are common, but they aren't always fully compatible with Earth life. Nonetheless, most have at least a few areas where very hardy humans can survive, albeit with high mortality rates (the poles of Fyrstaat and Tanith, the equator of Haven). A rare few, like Sparta, are nearly ideal for Earthlife, if slightly off in gravity and length of day. And some worlds, like New Caledonia, require extensive {{terraform}}ing. The alien-inhabited Mote Prime requires respirators. The double-planet system of Franklin/New Washington required Earth plants to be genetically altered for the red sunlight.

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* Subverted in the ''CoDominium'' ''Literature/CoDominium'' universe. Life-bearing worlds are common, but they aren't always fully compatible with Earth life. Nonetheless, most have at least a few areas where very hardy humans can survive, albeit with high mortality rates (the poles of Fyrstaat and Tanith, the equator of Haven). A rare few, like Sparta, are nearly ideal for Earthlife, if slightly off in gravity and length of day. And some worlds, like New Caledonia, require extensive {{terraform}}ing. The alien-inhabited Mote Prime requires respirators. The double-planet system of Franklin/New Washington required Earth plants to be genetically altered for the red sunlight.
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