Alternate Planets, Suns, Stars, and Solar Systems Thread

Discussion in 'Alternate History Maps and Graphics' started by Red Arturoist, Feb 19, 2014.

  1. Tangle Well-Known Member

    Joined:
    Aug 16, 2012
    Location:
    The Federalized Republic of Howard's Landing
    idk

    More seriously:
    a4: The very interiors of planets are... extremely odd. A smaller core for a more massive planet may mean the core's more dense, and that's likely to make the core at least a little hotter, but I don't think this would.

    a9: Generally, habitable zones for close binaries are found by taking the luminosities of both stars- from there, simple worldbuilding tutorials like Artifexian's solar system videos should answer that question for you.

    b1: You should be able to get a brand of cyanobacteria that thrives in such conditions- even if you had to guess how cyanobacteria lived on early Earth to do it.
    b1b: Probably, eventually- barring catastrophic climactic change or a big solar flare?

    b2: ...Possibly. I don't recall, but I think sulfur dioxide is pretty sucky for clouds.
    b2b: If it was evolved for it.

    b3: Again, possibly. If I recall correctly, its lack of a magnetic field is integral to the loss of Mars' own atmosphere- if it's younger, or if you find a way to get its core running longer (higher mass is an easy solution), it'll probably be fine.

    b9: That probably involves complicated fluid dynamics calculations, but so long as the methane doesn't get messed up it should at least tip the temperature a little longer- though you certainly don't need to be above zero celsius to have liquid water, even if it's the same pressure as Earth's surface.
     
  2. JohnWarrenDailey Well-Known Member

    Joined:
    Oct 22, 2015
    The Three Suns.jpg

    I have here a trinary system of red giants. Judging from the size and luminosity, we can confer that each star has been a red giant for 542 million years, which means it has less than the same time to expire left. (Or perhaps far longer because apparently, some red giants can last up to twice as long as Earth's current lifespan!) If you think, judging from this map, that the binary is a little too close for comfort, this is not to scale. In fact, the first two stars orbit each other from a distance of four AUs (pretty much the distance between Jupiter and Saturn). What, then, would the resulting distance be for the third, solitary red giant? And in this system, how far from the third system will the habitable zone begin, and how far will it expand? How big and how bright, exactly, will a 542-million-year-old red giant be?
     
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  3. Isaac Beach Manservant to Melon the Mischievous Mog

    Joined:
    Jan 9, 2016
    Location:
    The Kingdom at the Bottom of the World
    My map in this same thread, three pages back, and the base of an Inkscape map from one page ago :rolleyes::

    0D4E81D2-1F85-498D-A222-901AB5734E39.png
     
  4. damein fisher This bad boy can fit so many maps in it

    Joined:
    Aug 17, 2017
    Location:
    A literal Hole in the Ground.
    My deepest apologies; I found that in my base map pit and assumed it was a map someone on DA made for me a while ago. I'll remove it post haste
     
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  5. Isaac Beach Manservant to Melon the Mischievous Mog

    Joined:
    Jan 9, 2016
    Location:
    The Kingdom at the Bottom of the World
    It’s fine, I wasn’t that bothered, just would’ve liked some credit. But thank you nonetheless :biggrin:.
     
  6. damein fisher This bad boy can fit so many maps in it

    Joined:
    Aug 17, 2017
    Location:
    A literal Hole in the Ground.
    Honestly, if I had known it was someone else's map, I wouldn't have even used it. I can't tell you how embarrassed I am
     
  7. Iron_Lord Well-Known Member

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    Oct 21, 2019
    Is there any Binar Star Systems out there? Can NOT find a way to make a planet in such a unstable enviroments.
     
  8. BrobDingnag Well-Known Member

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    Feb 21, 2019
    What? There are plenty of binary planetary systems.
     
  9. Battlestar_Cydonia Le singe conduit l'autobus!

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    Mar 23, 2008
    Location:
    Encamped before the Eigelsteintor
    These two videos might help:



    They're on a channel called Artifexian, from an Irish guy who's doing a series on world-building. Starting from the star and working down into planets, climate, language, cultures, etc.
     
    Last edited: Oct 28, 2019
  10. Iron_Lord Well-Known Member

    Joined:
    Oct 21, 2019
    Heeeyy.... Thanks! These are great! I am creating a Planet Called Krenz for a series of Sci-Fi novels and Graphic Novels. This works nicely!
     
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  11. Iron_Lord Well-Known Member

    Joined:
    Oct 21, 2019
    Cool... I like the design. I was planning on making a similar planet that orbits a type p Binary Star System. What sort of planetary design would you call this? Is it even habitable? (by seasonal migratory animals?)
     
    Last edited: Nov 18, 2019
  12. Iron_Lord Well-Known Member

    Joined:
    Oct 21, 2019
    Plus, does anyone know any good planet map making software/sites?
     
  13. Tangle Well-Known Member

    Joined:
    Aug 16, 2012
    Location:
    The Federalized Republic of Howard's Landing
    Tútídis is the third planet in the Laugus sub-system of Sábális system. It is a mid-sized world generally matching the concept of a desert planet, with a somewhat thin nitrogen-argon atmosphere with few clouds and an extreme temperature (daytime temperatures range between 50 and 120 degrees celsius) due to the increased size of its early-giant parent star. Despite this, it is the most habitable planet in Sábális system, with land capable of sustaining plants (given enough water) and, given the proper conditions (no humidity (easy on this world), as much exposed surface area as possible, and quite a lot of water) sustaining humans for extended periods of time. As a result it is the second-most populous world in the system, following Salúna's undersea cities. The most populous areas of Tútídis are the basins- the poles, and several other places where water and air have gathered. These places naturally have more mild weather than elsewhere, their thicker atmosphere and water keeping the temperature between 40 degrees in height of summer and 10-15 degrees in the depth of winter (depending on the position of the first and third stars in the system). These areas have been terraformed, as well- the nitrogen-argon atmosphere is complemented by a breathable amount of oxygen, so in the winters it's possible for a person to step out of their house and breathe in the cool fresh air. Most basins have rejected the assistance of a proposed orbital reflection ring to give them light during the winter- they believe that relying on a natural source of light separates them meaningfully from the habs in orbit.

    bigout.png
     
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  14. Jürgen Well-Known Member

    Joined:
    Jul 16, 2016
    Felixanholt.png
    Felix Anholt


    First visited in 2123 by the Ibn Battuta (Mahex corporation) 31 light years from Earth, the system was lifeless, home to a single planet in the habitable zone, one Jovian giant and one Superjovian. The system was already uninteresting, but it was made worse by the planet only had a few percent water. There was no interesting alien biochemistry to explorer and exploit, the planet was too marginal for terraforming, and the Superjovian had been captured two billion years ago, cleaning up much of the asteroid of the system. Mahex still set up a claim to the system, in hope that someone would buy it, the Superjovian at least had industrial potential, and while poor in asteroids, it still had enough to feed any local industry for a billion years. Several moons of the Jovian were interesting, but ironic as two was captured planets, they was simply too big to use for extraction and to cold for surface terraforming, through the Earth sized moon had large seas under a relative thin layer of ice, no more than tens of meter thick at equator. The habitable planet also had a small but extremely metal rich moon, believed to be a captured inner planet.


    To the luck of Mahex the Ymir Terraforming Cooperative was looking for a desert planet for experiment in terraforming, and the system was only seven light years from Hydra Idun the center of the cooperative in the spinward sector. They bought the system cheaply in 2130 and named it Felix Anholt. The “Felix” (happy) was used by cooperative from system with only an arid world in the habitable zone and “Anholt” was an old Scandinavian island known for its desert-like landscape. The habitable planet was named Balar after the Celtic God of drought.


    The Ymir Cooperation believed that while early in colonization only first-rate worlds was colonized or terraformed, as they were taken second-rate worlds would increase in value this close to Earth itself and wished to develop useful terraforming technics. As such they were not interested in increasing the planet hydrosphere but develop a stable and functioning ecosystem with the limited water resources.


    The Ymir Cooperation were known for its technic of seeding worlds in waves with more and more complex life and simply leaving them fallow between seedings, could see that a more active terraforming was needed, and permanent orbital industry and settlement was placed above the planet early on. Only after half a century of terraforming, a significant part of the population settles on the colony. Until 2297 it stayed a sleepy backward of Ymir’s possession in the region with less than a hundred million living in the system. Most resources came from the continued development of Balar, and the local industry was limited in size. But in 2297 the pirate warlord Jim Chun conquered Hydra Idun and the Ymir Cooperation was thrown into chaos with the spinward part of the cooperation cut of from support from elsewhere. This forced Felix Anholt to fend for itself, this lasted until one of Chun’s navies arrived in 2301, and Felix Anholt was given the choice between paying tribute or face orbital bombardment.


    The next 78 years Felix Anholt was a vassal of Chun Dynasty, early on the poor system was forced to pay the tribute in corvée, delivering workers and soldiers to the Chun Dynasty. This was widely hated, and the space industries was expanded so that the tribute could be paid in good and money. The small moon of Balar with its vast richness and low gravity was very helpful in this. The pride of Felix Anholt was the shipyards, while the system lacked the infrastructure to produce their own Alcubierre drive, they were able to import those and build interstellar freights and warships. Of course, Chun and his descendants kept an eye on Felix Anholt to ensure, they didn’t build their own navy. But even with its shipyards it was still a backwater.


    But an empire kept together with force often run into problems, in 2379 a succession crisis threw the Dynasty into a decade long civil war. For Felix Anholt this meant they was left alone for the first time in almost a century. From the moment the local naval garrison left for the civil war, the shipyards shifted to mass producing gunships, warship meant for in system use and unable to go FTL, while large orbital fortification was built. This was an opportunity, which maybe would not come in lifetime again. As such when the civil war ended in three successor states and large chumps of the Chun Dynasty eaten by its rivals. There were several attempts by the different successor states to vassalize Felix Anholt again. The result was several beaten fleets.


    As such Felix Anholt entered the 25th century as free but fortified world. They reestablished contact with the Ymir Cooperation which by this time had ended up centered around the Jotuns a trinary star system almost 350 lightyears from Earth coreward. A reunification was impractical, but friendly relationship was established, and information flowed freely. Several other former Ymirian worlds in the region, who had also regained their freedom, also established contact with Felix Anholt, but no one wished a union, instead they organized themselves in a loose alliance (SYTA) with a small unified alliance navy, and strong local interplanetary gunship navies.


    SYTA would keep the local peace for centuries, strong enough to deal with pirates and help the members defending against invasions. But too weak to conquer its neighbors, its only aggressive wars it entered was the liberation of Hydra Idun and the rest of the local occupied Ymirian Worlds in the region in 2435-39. So, the local region returned to sleep and Felix Anholt could focused on the continued terraforming of Balar, while having been habitable for centuries, the ecosystem was still not fully stable, and the process continued. The system returned to be a sleepy backwater even with a population in the hundreds of millions.


    Terraforming of the Earth-size Jovian moon (Trymheim) was begun, it was never expected it would be fit for major human settlement, but a breathable atmosphere would enable a better use of the planet, even if it would never become hospitable than the Antarctic Peninsula on Earth at least not above water.


    By the early 27th Century a new empire was rising, and it was clear that it couldn’t be stopped. The Terran Commonwealth wished to unite mankind under one state. It offered equality under the banner of Terra. The SYTA discussed whether, they should fight Terra, but in the end, they saw Terran hegemony as inevitable, and they negotiated a peace with Terra.


    The next part includes a spoiler to Castle Federation by Glynn Stewart, whose universe I borrowed to write this idea into.

    This was the end of being a backwater, Felix Anholt turned out soldier for the Terran navies and armies, its shipyards rose to prominence again. The Superjovian became a major industrial hub. This lasted for more than a century until the Terran Q-net was destroyed in the war with the Alliance of Free Star and chaos reign again. But the spinward Ymirians knew that Terran Hegemony was still inevitable, and they stayed loyal to the new military Junta.


    At this point Felix Anholt are still a lightly populated system, home to only a little above 1,5 billion people with 2/3 living on Balar, 5 million on Trymheim and the rest in orbit and on non-terraformed worlds, but it’s far more industrialized than its relative low population indicates.


    I would like to thank slimysomething for having used his planet building template to make this map.

    https://www.deviantart.com/slimysomething/art/Build-a-Solar-System-Kit-784312541k
     
  15. Story of Rachel Dirty Kid

    Joined:
    Jun 7, 2018
    I don't have map making capabilities right now. I hope this is fine.

     
    Last edited: Nov 20, 2019
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  16. Cantra Well-Known Member

    Joined:
    Nov 24, 2018
    Location:
    An alternate Earth
    Does anyone have Worldas for hypothetical worlds such as Vulcan?