1. spklvr
    Offline

    spklvr Contributing Member Contributor

    Joined:
    Oct 29, 2010
    Messages:
    734
    Likes Received:
    36
    Location:
    Sarpsborg, Norway

    A land of perpetual twilight....

    Discussion in 'Research' started by spklvr, Feb 26, 2011.

    I'm trying to be somewhat realistic in my fantasy story, and wondered what kind of temperature there would be in a land of perpetual twilight. In other words, never fully day and never fully night. I imagine kind of cold, so I made the neighboring country the land of fire, with a lot of volcanoes that would warm the ground and air... would that work? What can grow in this kind of country? I've been picturing it with rice fields.

    Well, it's fantasy, so I can make it whatever I want, but it's fun to know. :p
     
  2. Melzaar the Almighty
    Offline

    Melzaar the Almighty Contributing Member Contributor

    Joined:
    Aug 28, 2010
    Messages:
    1,792
    Likes Received:
    55
    Location:
    UK
    Why is it perpetually in twilight?
     
  3. Mystic_snowfang
    Offline

    Mystic_snowfang Member

    Joined:
    Feb 22, 2011
    Messages:
    38
    Likes Received:
    0
    Thing about fanatasy is that there aren't always real explinations for something. Maybe it's a curse, or maybe it's just always been that way because the gods were insane or drunk when they made that part of the world.
     
  4. Halcyon
    Offline

    Halcyon Contributing Member Contributor

    Joined:
    Apr 19, 2010
    Messages:
    510
    Likes Received:
    23
    Location:
    England
    spklvr

    Just think of your own country in mid-winter, and you'll probably be close! ;)
     
  5. spklvr
    Offline

    spklvr Contributing Member Contributor

    Joined:
    Oct 29, 2010
    Messages:
    734
    Likes Received:
    36
    Location:
    Sarpsborg, Norway
    In my fantasy world, the sun don't reach the top of the planet. In the above Land of Snow there is never any sun.
     
  6. Melzaar the Almighty
    Offline

    Melzaar the Almighty Contributing Member Contributor

    Joined:
    Aug 28, 2010
    Messages:
    1,792
    Likes Received:
    55
    Location:
    UK
    Then not much will grow at all - lichens and stuff. :p Plants need sun to grow, and at best you're going to get some little rubbery-leaved things that live in cracks.

    Just scientifically.

    If it's fantasy by all means adapt some plants, but they're going to be different. Think the kind of stuff that lives in the dark by deep sea vents. So they might not have leaves - or they will use them in very different way.
     
  7. mammamaia
    Offline

    mammamaia nit-picker-in-chief Contributor

    Joined:
    Nov 21, 2006
    Messages:
    19,316
    Likes Received:
    1,014
    Location:
    Coquille, Oregon
    how can the sun never reach the 'top' of the planet?... does it not rotate? [if it didn't, there wouldn't be any life on it, would there?]... even if the planet's axis was off the perpendicular, as earth's is, that would still make the 'top' be in sunlight for half of its orbit around the sun...
     
  8. Yandos
    Offline

    Yandos Member

    Joined:
    Jan 27, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    UK
    The temprature doesn't nessaserilly need to be cold. Our planet has the variable climate we know because of the air mixture thats here. If you were to take 20% of the nitrogen away from our air mixture and replace it with carbon dioxide, the atmosphere would retain more heat. In the UK, we have the gulf stream that supplies most of our warmth (and rain) but without it we get very cold weather.

    Volcano's on the other hand block out the sun when erupting and lower the temprature (when it's a big eruption). And volcano's themselves don't heat the ground, the magma does that. If you wanted to use this method, then the ground would be quite acidic and stunt plantlife. Plus the pockets of magma under your land would make it quite unstable and likely cause earthquakes and collapsed ground.

    There are plenty of floras that grow in dark places, mushrooms for one. There are also lots of plants that grow in the dense dark rainforests around the world. You'll even find flora in caves where light is non-existent.


    Our planet only spins on 2 axes, but if it spun on all 3 axes and at the right pace, then there would be an area of perpetual twilight as well as an area of perpetual daylight.

    Hopefully this will give an idea on where to go to fine out more.
     
  9. Ellipse
    Offline

    Ellipse Contributing Member Contributor

    Joined:
    Jun 8, 2010
    Messages:
    714
    Likes Received:
    32
    In parts of Alaska and Antarctica, during certain times of the year, rather than have a normal night or day they will instead be stuck in a period of twilight.

    For example, they will have a normal day, and then instead of being totally dark at night they will have twilight, or vice versa, but never both.
     
  10. spklvr
    Offline

    spklvr Contributing Member Contributor

    Joined:
    Oct 29, 2010
    Messages:
    734
    Likes Received:
    36
    Location:
    Sarpsborg, Norway

    Yeah, I'm gonna steal some of those, thank you :D

    Oh, post number 100! yay
     
  11. mammamaia
    Offline

    mammamaia nit-picker-in-chief Contributor

    Joined:
    Nov 21, 2006
    Messages:
    19,316
    Likes Received:
    1,014
    Location:
    Coquille, Oregon
    huh?... what '2 axes'?... and how could any spherical body spin on 3, unless it's a gyroscope?
     
  12. Annûniel
    Offline

    Annûniel Contributing Member Contributor

    Joined:
    Oct 25, 2008
    Messages:
    564
    Likes Received:
    31
    Location:
    Ye Old Dominion, USA
    I believe they are trying to say Earth spins on the Y axis (which gives us day and night) and around the sun (which gives us our seasons). I don't see how spinning around the sun is considered to be an axis though...

    A spherical body that spins on the both axises would spin from side to side (like Earth does when we get day and night) and top to bottom (think switching the poles) at the same time. Add to that spinning around the sun to give seasons and you've got a really dizzy mess. :p
     
  13. Yandos
    Offline

    Yandos Member

    Joined:
    Jan 27, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    UK
    Your right that I didn't explain myself clearly, but any 3 dimensional objects can spin on all 3 axes. y= is the initial (lateral) spin, x= is the secondary (top to bottom) spin and the z= is a spiral spin of the axes themselves.

    However what I was referring to was just the addition of the spiral spin of the axes and this would give the desired effects asked for.

    And again you were right about earth spinning on 2 axes. It only spins on it's lateral axis. :redface:
     
  14. Porcupine
    Offline

    Porcupine Contributing Member

    Joined:
    Feb 13, 2011
    Messages:
    346
    Likes Received:
    21
    Location:
    Frankfurt, Germany
    Earth also precesses a little, but let's not get into sticky details. :)

    A planet spinning around just one axis would be enough for there to be a zone of perpetual twilight, if the axis is aligned correctly with the rotation around the star.
     
  15. thecommabandit
    Offline

    thecommabandit Member

    Joined:
    Apr 8, 2009
    Messages:
    35
    Likes Received:
    1
    All you need is for the axis of rotation to be perpendicular to the line joining the planet and its parent star. Though this would only produce perpetual twilight at the poles. A special case of this is a planet tidally locked to its star, so that it always presents one face to the sun. Astrobiologists have theorised that life would be possible on the fringe between the light and dark hemispheres, which are always in twilight.
     
  16. SeverinR
    Offline

    SeverinR Contributing Member

    Joined:
    Feb 15, 2011
    Messages:
    477
    Likes Received:
    7
    Location:
    New Madison Ohio
    That was what I was going to say.
    It throws off the body clock. The change of light tells the body when to sleep, eat, etc. When light doesn't change much, the body gets confused.

    If the world doesn't turn:
    But I believe the side with the sun all the time would die off, over heated
    and the side without sun would die off, no photo synthesis for plants and lack of heat. (no plants= no plant eaters=the meat eaters eat one another until there gone.)
     

Share This Page