History Main / AllPlanetsAreEarthLike

22nd Apr '18 3:34:11 AM KoshAndSheridan
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* ''Literature/{{Coyote}}'': The the earth-sized moon of the gas giant in habitable orbit around 47 Ursae Majoris isn't exactly an "all planets Earth-like" occurence (but instead an Earthlike world is supposedly discovered there before the mission is sent, and at 46 light years away there are hundreds of stars that would be closer that wouldn't have such planets, given that this is the first mission of its kind sent from Earth and so we could presume it's the closest); so mainly averted. However, even though such a world could be spectrally-analyzed from a distance with sensitive enough equipment to ensure its atmosphere's chemical content, and gravity inferred through mass (from its orbit) and imaging of the body, there was still the risk that the indigenous life there would be of right-handed chirality rather than left-handed (as Earth life is), which would mean none of it would be consumable to the settlers. This was the first "moment of truth" once the humans landed there--but the biologists confirmed that luckily, the life was left-handed chirality as well. It is unsure whether the chance of this is really 50/50 as seemingly implied though, as we don't yet have samples of any extraterrestrial life ([[ConspiracyTheory at least widely known]]) yet, let alone a widespread variety to statistically analyze.
22nd Apr '18 3:14:31 AM KoshAndSheridan
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* ''Literature/{{Coyote}}'': The the earth-sized moon of the gas giant in habitable orbit around 47 Ursae Majoris isn't exactly an "all planets Earth-like" occurence (but instead an Earthlike world is supposedly discovered there before the mission is sent, and at 46 light years away there are hundreds of stars that would be closer that wouldn't have such planets, given that this is the first mission of its kind sent from Earth); so mainly averted. However, even though such a world could be spectrally-analyzed from a distance with sensitive enough equipment to ensure its atmosphere's chemical content, and gravity inferred through mass (from its orbit) and imaging of the body, there was still the risk that the indigenous life there would be of right-handed chirality rather than left-handed (as Earth life is), which would mean none of it would be consumable to the settlers. This was the first "moment of truth" once the humans landed there--but the biologists confirmed that luckily, the life was left-handed chirality as well. It is unsure whether the chance of this is really 50/50 as seemingly implied though, as we don't yet have samples of any extraterrestrial life ([[ConspiracyTheory at least widely known]]) yet, let alone a widespread variety to statistically analyze.

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* ''Literature/{{Coyote}}'': The the earth-sized moon of the gas giant in habitable orbit around 47 Ursae Majoris isn't exactly an "all planets Earth-like" occurence (but instead an Earthlike world is supposedly discovered there before the mission is sent, and at 46 light years away there are hundreds of stars that would be closer that wouldn't have such planets, given that this is the first mission of its kind sent from Earth); Earth and so we could presume it's the closest); so mainly averted. However, even though such a world could be spectrally-analyzed from a distance with sensitive enough equipment to ensure its atmosphere's chemical content, and gravity inferred through mass (from its orbit) and imaging of the body, there was still the risk that the indigenous life there would be of right-handed chirality rather than left-handed (as Earth life is), which would mean none of it would be consumable to the settlers. This was the first "moment of truth" once the humans landed there--but the biologists confirmed that luckily, the life was left-handed chirality as well. It is unsure whether the chance of this is really 50/50 as seemingly implied though, as we don't yet have samples of any extraterrestrial life ([[ConspiracyTheory at least widely known]]) yet, let alone a widespread variety to statistically analyze.
22nd Apr '18 3:12:46 AM KoshAndSheridan
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* ''Literature/{{Coyote}}'': The the earth-sized moon of the gas giant in habitable orbit around 47 Ursae Majoris isn't exactly an "all planets Earth-like" occurence (but instead an Earthlike world is supposedly discovered there before the mission is sent, and at 46 light years away there are hundreds of stars that would be closer that wouldn't have such planets, given that this is the first mission of its kind sent from Earth); so mainly averted. However, even though such a world could be spectrally-analyzed from a distance with sensitive enough equipment to ensure its atmosphere's chemical content, and gravity inferred through mass (from its orbit) and imaging of the body, there was still the risk that the indigenous life there would be of right-handed chirality rather than left-handed (as Earth life is), which would mean none of it would be consumable to the settlers. This was the first "moment of truth" once the humans landed there--but the biologists confirmed that luckily, the life was left-handed chirality as well. It is unsure whether the chance of this is really 50/50 as seemingly implied though, as we don't yet have samples of any extraterrestrial life ([[ConspiracyTheory at least known]]) yet, let alone a widespread variety to statistically analyze.

to:

* ''Literature/{{Coyote}}'': The the earth-sized moon of the gas giant in habitable orbit around 47 Ursae Majoris isn't exactly an "all planets Earth-like" occurence (but instead an Earthlike world is supposedly discovered there before the mission is sent, and at 46 light years away there are hundreds of stars that would be closer that wouldn't have such planets, given that this is the first mission of its kind sent from Earth); so mainly averted. However, even though such a world could be spectrally-analyzed from a distance with sensitive enough equipment to ensure its atmosphere's chemical content, and gravity inferred through mass (from its orbit) and imaging of the body, there was still the risk that the indigenous life there would be of right-handed chirality rather than left-handed (as Earth life is), which would mean none of it would be consumable to the settlers. This was the first "moment of truth" once the humans landed there--but the biologists confirmed that luckily, the life was left-handed chirality as well. It is unsure whether the chance of this is really 50/50 as seemingly implied though, as we don't yet have samples of any extraterrestrial life ([[ConspiracyTheory at least widely known]]) yet, let alone a widespread variety to statistically analyze.
22nd Apr '18 3:11:54 AM KoshAndSheridan
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* ''Literature/{{Coyote}}'': The the earth-sized moon of the gas giant in habitable orbit around 47 Ursae Majoris isn't exactly an "all planets Earth-like" occurence (but instead an Earthlike world is supposedly discovered there before the mission is sent, and at 46 light years away there are hundreds of stars that would be closer that wouldn't have such planets, given that this is the first mission of its kind sent from Earth); so mainly averted. However, even though such a world could be spectrally-analyzed from a distance with sensitive enough equipment to ensure its atmosphere's chemical content, and gravity inferred through mass (from its orbit) and imaging of the body, there was still the risk that the indigenous life there would be of right-handed chirality rather than left-handed (as Earth life is), which would mean none of it would be consumable to the settlers. This was the first "moment of truth" once the humans landed there--but the biologists confirmed that luckily, the life was left-handed chirality as well. It is unsure whether the chance of this is really 50/50 as seemingly implied though, as we don't yet have samples of any extraterrestrial life ([[ConspiracyTheory at least known]]) yet, let alone a widespread variety to statistically analyze.
4th Mar '18 12:17:49 PM Tarkas
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*** The TOS Writer's Guide acknowledged this trope right from the start: the formal orders to the captain of the ''Enterprise'' found therein contained instructions that the ship would mostly confine its operations to Class-M planets, though the ship did, of course, carry spacesuits.
28th Feb '18 4:01:18 PM ScorpiusOB1
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*** Unfortunately, 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[[note]]These are ''upper'' masses, which are considered unrealistic due to the high densities those planets would have. While is generally now assumed that Kepler-22 is a small version of Neptune, perhaps one or even the two worlds of Kepler-62 will be luckier[[/note]].

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*** Unfortunately, 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[[note]]These are ''upper'' masses, which are considered unrealistic due to the high densities those planets would have. While is generally now assumed that Kepler-22 Kepler-22b is a small version of Neptune, perhaps one or even the two worlds of Kepler-62 will would be luckier[[/note]].



*** 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 our poor biosphere would be sterilized. 442b is a "Super-Earth" which again, we don't know much about. It could be a LethalLavaLand or a mini-Neptune like body, and Proxima Centauri b suffers something similar to 186f and 438b.

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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 our poor biosphere would be sterilized. 442b is a "Super-Earth" which again, we don't know much about. It could be a LethalLavaLand or a mini-Neptune like body, and Proxima Centauri b suffers something similar to 186f and 438b. As for the seven planets of TRAPPIST-1, not only they may have been flared as the previous examples but also [[https://en.wikipedia.org/wiki/TRAPPIST-1b two]] [[https://en.wikipedia.org/wiki/TRAPPIST-1c of]] them are ''[[DeathWorld nasty]]'' places, b being much worse than Venus, [[https://en.wikipedia.org/wiki/TRAPPIST-1h other]] is likely too cold to support liquid water, and of the four remaining [[https://en.wikipedia.org/wiki/TRAPPIST-1f another]] at least is like b basically a searing hot pressure-cooker world
9th Feb '18 3:04:20 AM JackG
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* Played straight as you'd expect with the NoBudget ''Series/BlakesSeven''. Though in fairness most planets they land on are or were human colonies, which would have been chosen for their ability to support human life. Spacesuits are only used for vacuum however, with the occasional mention of breathing masks. Thermal suits are worn for the more colder planets. There's a nice subversion of the trope in "The Harvest of Kairos". Servalan has captured our heroes and agrees that, if they hand over command authorisation of the Liberator to her, she will teleport them down to a planet with Earth-like conditions. Unfortunately the nearest such planet is Kairos, which happens to be a DeathWorld thanks to its [[TheSwarm lifeforms]].

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* Played straight as you'd expect with the NoBudget British sci-fi series ''Series/BlakesSeven''. Though in fairness most planets they land on are or were human colonies, which would have been chosen for their ability to support human life. Spacesuits are only used for vacuum however, with the occasional mention of breathing masks. Thermal suits are worn for the more colder planets. There's a nice subversion of the trope in "The Harvest of Kairos". Servalan has captured our heroes and agrees that, if they hand over command authorisation of the Liberator to her, she will teleport them down to a planet with Earth-like conditions. Unfortunately the nearest such planet is Kairos, which happens to be a DeathWorld thanks to its [[TheSwarm lifeforms]].
9th Feb '18 3:03:40 AM JackG
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* Played straight as you'd expect with the NoBudget ''Series/BlakesSeven''. Though in fairness most planets they land on are or were human colonies, which would have been chosen for their ability to support life. Spacesuits are only used for vacuum however, with the occasional mention of breathing masks. Thermal suits are worn for the more colder planets. There's a nice subversion of the trope in "The Harvest of Kairos". Servalan has captured our heroes and agrees that if they hand over command authorisation of the Liberator to her, she will teleport them down to a planet with Earth-like conditions. Unfortunately the nearest such planet is Kairos, which happens to be a DeathWorld thanks to its aggressive lifeforms.

to:

* Played straight as you'd expect with the NoBudget ''Series/BlakesSeven''. Though in fairness most planets they land on are or were human colonies, which would have been chosen for their ability to support human life. Spacesuits are only used for vacuum however, with the occasional mention of breathing masks. Thermal suits are worn for the more colder planets. There's a nice subversion of the trope in "The Harvest of Kairos". Servalan has captured our heroes and agrees that that, if they hand over command authorisation of the Liberator to her, she will teleport them down to a planet with Earth-like conditions. Unfortunately the nearest such planet is Kairos, which happens to be a DeathWorld thanks to its aggressive lifeforms.[[TheSwarm lifeforms]].
9th Feb '18 3:02:11 AM JackG
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Added DiffLines:

* Played straight as you'd expect with the NoBudget ''Series/BlakesSeven''. Though in fairness most planets they land on are or were human colonies, which would have been chosen for their ability to support life. Spacesuits are only used for vacuum however, with the occasional mention of breathing masks. Thermal suits are worn for the more colder planets. There's a nice subversion of the trope in "The Harvest of Kairos". Servalan has captured our heroes and agrees that if they hand over command authorisation of the Liberator to her, she will teleport them down to a planet with Earth-like conditions. Unfortunately the nearest such planet is Kairos, which happens to be a DeathWorld thanks to its aggressive lifeforms.
4th Feb '18 5:34:54 PM zarpaulus
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* ''VideoGame/{{Stellaris}}'' does have planets that aren't inhabitable, such as gas giants, "barren worlds" (including Mars, asteroids, most moons), and toxic worlds. And inhabitable planets themselves are divided into ten types (Earth is "continental") and species favor the same type of planet they were native to, though populations can be genetically modified to favor different planet types and inhabitable planets can be terraformed.

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* ''VideoGame/{{Stellaris}}'' does have planets that aren't inhabitable, such as gas giants, "barren worlds" (including Mars, asteroids, most moons), and toxic worlds. And inhabitable planets themselves are divided into ten eleven types (Earth is "continental") and species favor the same type of planet they were native to, though populations can be genetically modified to favor different planet types and inhabitable planets can be terraformed.terraformed into different types.
** Of particular note are Gaia Worlds, which are somehow 100% inhabitable to everyone and are considered "holy" by Spiritualists, though implied to be produced by Precursor terraforming projects (or the player when they unlock the late-game tech). And Tomb Worlds, which are nuclear wastelands inhospitable to everyone not native to such planets.
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