History Main / AllPlanetsAreEarthLike

11th Aug '17 9:31:36 PM lorgskyegon
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* Averted in ''Film/LostInSpace''. It's mentioned that of all the planets found and examined by the space explorers, there is only one which can support human life.


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** Not mentioned in the films, but mentioned in the EU, Kashyyyk and the moon of Endor are said to have quite a bit lower gravity than standard. Hence the incredible size of some of the flora and fauna.
** Given that almost all of the primary characters are human, though, it is likely that it's more of a form of selection bias, i.e. we can survive here so the action takes place here.
22nd Jun '17 2:07:12 AM peterbruells
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* Confirmed and subverted in the ''Literature/PerryRhodan'' series. The Milky Way – rather the whole universe – is full of Earth-like planets, often to be settled by Terran or related colonists. But it's also full of hot and heavy planets suitable for hydrogen-breathers, though oxygens-breathers and hydrogen-breathers rarely interact in day-to-day life.
Also, many of of the earth-like planets have extreme environments, requiring genetic modification from the settlers. Though there are hundreds of heavy-gravity worlds with extreme climates that are being settled „naturally“ by one offshoot of humanity, whose ancestors got mofidicated once.

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* Confirmed and subverted in the ''Literature/PerryRhodan'' series. The Milky Way – rather the whole universe – is full of Earth-like planets, often to be settled by Terran or related colonists. But it's also full of hot and heavy planets suitable for hydrogen-breathers, though oxygens-breathers and hydrogen-breathers rarely interact in day-to-day life. \n Also, many of of the earth-like planets have extreme environments, requiring genetic modification from the settlers. Though there are hundreds of heavy-gravity worlds with extreme climates that are being settled „naturally“ by one offshoot of humanity, whose ancestors got mofidicated once.
22nd Jun '17 2:05:17 AM peterbruells
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* Confirmed and subverted in the ''Literature/PerryRhodan'' series. The Milky Way – rather the whole universe – is full of Earth-like planets, often to be settled by Terran or related colonists. But it's also full of hot and heavy planets suitable for hydrogen-breathers, though oxygens-breathers and hydrogen-breathers rarely interact in day-to-day life.
Also, many of of the earth-like planets have extreme environments, requiring genetic modification from the settlers. Though there are hundreds of heavy-gravity worlds with extreme climates that are being settled „naturally“ by one offshoot of humanity, whose ancestors got mofidicated once.
7th Jun '17 12:24:43 PM dieseldragons
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*** Sadly another subversion. 186f and 438b are being bombarded with extreme ultraviolet (XUV) fluxes, violent stellar flares, and powerful radiation activity from their Red Dwarf parent star every 100 days. Disregarding the tidal locking problems, were you to swap Earth with either of them, and the biosphere would be sterilized. 442b is "Super-Earth" which again, we don't know much about. It could be a LethalLavaLand or a mini-Neptune like body.

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*** Sadly another subversion. 186f and 438b are being bombarded with extreme ultraviolet (XUV) fluxes, violent stellar flares, and powerful radiation activity from their Red Dwarf parent star every 100 days. Disregarding the tidal locking problems, were you to swap Earth with either of them, and the our poor biosphere would be sterilized. 442b is "Super-Earth" which again, we don't know much about. It could be a LethalLavaLand or a mini-Neptune like body.
7th Jun '17 12:22:37 PM dieseldragons
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*** Sadly another subversion. 186f and 438b are being bombarded with extreme ultraviolet (XUV) fluxes, violent stellar flares, and powerful radiation activity from their Red Dwarf parent star every 100 days. Disregarding the tidal locking problems, were you to swap Earth with either of them, and the biosphere would be sterilized. 442b is "Super-Earth" which again, we don't know much about. It could be a LethalLavaLand or a mini-Neptune like body.
7th Jun '17 12:14:26 PM dieseldragons
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*** Unfortunately, this world's mass is still unknown - it could be just below 52.8 Earth masses, making it a "mini-Neptune" and such celestial bodies are not promising abodes for life.

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*** Unfortunately, this world's Kepler-22b's mass is still unknown - it could be just below 52.8 Earth masses, making it a "mini-Neptune" and such celestial bodies are not promising abodes for life. We have the same problem with Kepler-62e and f. The estimates range between 36 and 35 Earth masses, not Earth-like in the strictest sense so less than ideal candidates in our search.
7th Jun '17 12:10:19 PM dieseldragons
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*** Unfortunately, this world's mass is still unknown - it could be just below 52.8 Earth masses, making it a "mini-Neptune" and such celestial bodies are not promising abodes for life.
7th Jun '17 12:03:27 PM dieseldragons
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* [[https://en.wikipedia.org/wiki/Rare_Earth_hypothesis The Rare Earth hypothesis]] exists for a reason - because we haven't found an abundance of worlds exactly like our own yet. Heck, we haven't even found a Solar System that's anything like ours yet. This is a plausible explanation to the Fermi paradox for [[AbsentAliens why we've not found any extraterrestrial civilizations]]. Spare a thought for astronomers [[NeedleInAStackOfNeedles working tirelessly to find one]].
13th May '17 5:28:31 PM nombretomado
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* For most part, ''Franchise/StarCraft'' averts this, as the vast majority of planets in the Koprulu Sector are said to be largely inhospitable to human life. In the original game, only Aiur appears to be anything close to an Earth-like planet, with most other planets supporting permanent human habitation depicted as semi-arid wastelands. [[AllThereInTheManual According to the backstory presented in the manual]], the [[SleeperShip colony ships]] were originally sent to colonize a habitable planet that was one year away from Earth, but ended up traveling blindly through space for twenty eight years when their navigation systems shut down. The supercomputer controlling the ships forced them to land on the nearest habitable planets before life support systems failed.

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* For most part, ''Franchise/StarCraft'' ''VideoGame/StarCraft'' averts this, as the vast majority of planets in the Koprulu Sector are said to be largely inhospitable to human life. In the original game, only Aiur appears to be anything close to an Earth-like planet, with most other planets supporting permanent human habitation depicted as semi-arid wastelands. [[AllThereInTheManual According to the backstory presented in the manual]], the [[SleeperShip colony ships]] were originally sent to colonize a habitable planet that was one year away from Earth, but ended up traveling blindly through space for twenty eight years when their navigation systems shut down. The supercomputer controlling the ships forced them to land on the nearest habitable planets before life support systems failed.
12th May '17 3:46:47 PM thatother1dude
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* In ''{{WesternAnimation/StrokerAndHoop}}'' the detectives encounter an elaborate con with a woman pretending to be an alien needing sapphires to return to her home planet "Sapphiria". Turns out she really is an alien and needs sapphires. At the end one of the detectives crash lands on an alien planet, sees a jogging alien and immediately tries the same con, claiming to be from the planet "Goldia" and he needs gold. In a few seconds he says "Wait, this isn't oxygen" and collapses.

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* In ''{{WesternAnimation/StrokerAndHoop}}'' ''WesternAnimation/StrokerAndHoop'' the detectives encounter an elaborate con with a woman pretending to be an alien needing sapphires to return to her home planet "Sapphiria". Turns out she really is an alien and needs sapphires. At the end end, one of the detectives crash lands on an alien planet, sees a jogging alien and immediately tries the same con, claiming to be from the planet "Goldia" and he needs gold. In a few seconds he says "Wait, this isn't oxygen" and collapses.
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