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Thread: Extreme Planetary Features vs realism

  1. #11
      xpian is offline
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    Olympus Mons on an earth-like planet

    Mars's Olympus Mons (and the three other Tharsis Montes) are very big volcanic mountains. They bulge from the surface to a ridiculous degree--Olympus Mons is three times the height of Mt. Everest, and that's on a planet that's half the size of Earth. Gravity? of course there's gravity. It would be a bit less up there, but not so much that you'd notice. Any point that's further from the planet's center of mass, including the top of Mt. Everest, has less gravity. It's just negligible. I think the confusion comes from the idea that there's zero G just a little further up, in space...which isn't true. There's gravity up there as well. The reason people on the ISS are weightless isn't because the Earth's gravity has stopped, it's because they are in free fall (they are orbiting the planet so swiftly that they are continuously "falling" around it.) You can't be in free-fall whilst standing on a mountain top--even one as tall as Olympus Mons.

    Air would be very thin up there, however, as Azelor has mentioned. Only enough for the tiniest life forms, and certainly not enough for any animals like humans. That's if you're being very accurate with your planet's atmosphere.

    The other thing about Olympus Mons to remember is how SHALLOW the slope of the mountain is. Seriously. You'd start walking up one side of the mountain and you wouldn't really be able to see the top. It would just be a gently rising slope in front of you. You'd keep walking, day after day, trudging over lava flows, and the air would just get thinner and thinner as you got higher up. Maybe the winds would get really nasty at certain levels, but you still wouldn't see the top of the mountain--just more slope rising in front of you. And you'd die long before you reached the top.

    Which is not to say that extreme verticality is impossible. There are cliffs on Mercury that are kilometers high. It's conceivable that you could have sharp, tall, spiky mountains taller than the Himalayas on an earth-like planet. Extreme materials, extreme geology, extreme plate tectonics...it's certainly possible to have crazy-tall mountains that you *would* see the tops of as you were climbing them...as you were dying on the slopes of them...

  2. #12
      Azelor is offline
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    Jupiter has a massive magnetic field but that magnetic field is not dangerous unless you are very close or far enough. But if it's too far, you lose the possible benefits of it. That is solving the radiation issue.

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      Naima is offline
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    Just got Universe sandbox , its pretty cool to simulate all the bodies, I tested two moons on earth and they orbit fine a Luna and a Titan aroung earth at a roper distance, though I dunno what effects could have on earth .... Adding a ring of debris around the moon gives special strange phenomena around earth and moon like trail of stuff going in and out orbits ... so far so fun ...

    but I hope they will implement some biology related habitats simulations as well ...
    Last edited by Naima; 07-15-2014 at 09:18 PM.

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      groovey is offline
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    Really interesting thread and great info and thoughts on some topics I had wondered about, so thank you to those of you taking the time to share it with the rest.

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      Naima is offline
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    If you have some experiments in mind about the systems I can perform them in the simulator .

    For the rest if you have ideas on weird natural or "innatural" features vs Realism please post them here and so lets have a whole thread about those arguments .

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      Naima is offline
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    Just found this other interesting program ....

    Extreme Planet Makeover

  7. #17
      Naima is offline
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    Another one .

    Space Engine - Home page
    Azelor likes this.

  8. #18
      Azelor is offline
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    the universe sandbox team is working on version 2. It will come out in alpha between thursday and someday.

  9. #19
      Naima is offline
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    Quote Originally Posted by Azelor View Post
    the universe sandbox team is working on version 2. It will come out in alpha between thursday and someday.
    Do u know if who has it can freely upgrade? And what features will be in it?

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      Azelor is offline
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