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Submitted: January 26
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Planet Under Constructionby ~Malicious-Monkey

Scraps

suggested I make a spacescape of Ilion after I uploaded some maps. I said something along the lines of "sure, when I get better at photoshop." Then I thought, why not get better at it now? So I downloaded some free brush packs, which are loads better than what I've been using before, and got to work.

Maps: [link]

Brushes:
[link]
[link]
[link]
[link]

My next step is to go and get a tablet.

~Whachamacallit1 Jan 27, 2013

Very interesting! It sort of seems that Aeneas has a very diverged ecosystem in comparison to Pandaros and Deiphobus, since Aeneas looks as if it's mostly dominated by black plants in this picture. Was this intentional, or are you simply not done with that continent? Also, for that perma storm: Zerraspace may prove me wrong, but I think a perma storm is quite possible, since that's going to be a place where air pressure is low and the seas are warm. It may fluctuate in strength, changing from a tropical storm to a hurricane, but I bet it could be quite permanent.

~Malicious-Monkey Jan 27, 2013 Hobbyist Traditional Artist

Aeneas is solid gray because it's not finished yet!

When it's done it will have mountains and rainforest and stuff.

~palaeorigamipete Jan 26, 2013 Hobbyist General Artist

this looks so amazing!

~Zerraspace Jan 26, 2013

You've definitely got a unique style - the atmosphere has an almost oily slick effect on the surface, and the surrounding ice makes it feel as if the unfrozen world is being strangled in its grip. At what resolution is the image you're working on? I know there's ammonia in the atmosphere, but I'm a bit surprised to learn that the atmosphere is orange; that either suggests a lot of dust or nitrous oxides and hydrocarbons.

~Malicious-Monkey Jan 26, 2013 Hobbyist Traditional Artist

Goooooood question. It goes to show what little I know about atmospheric science. I thought it would be yellowish because the light from the sun doesn't have much blue in it, so that's what's left. I read somewhere that an earthlike atmosphere would make a yellow or white sky on a red dwarf planet, but I don't know how that translates to a top-down view. But I'm open to putting some hydrocarbons and nitrogen oxides in the air. This planet needs plenty of greenhouse gases to keep it habitable.

I like how you put it, that the habitable world is being strangled by the ice. When the star's output fluctuates, as red dwarfs are prone to do, this causes erratic cycles of ice ages and thaws. Sometimes that edge ice encroaches pretty far into the cradle of life.

I put a perma-storm where the sun hits directly and all the currents converge. Is that plausible?

~Zerraspace Jan 27, 2013

You didn't happen to use this [link] as a source for the sky color, did you? From what I can tell there will be remain significant blue in the mix, and this should be true of the entirety of the upper atmosphere on the daylit side, hence it should appear blue/white from outer space (light hasn't passed through enough air yet to sufficiently scatter all the blue in it). However, on the surface and at the edges away from where the sun hits directly (the twilight zone, if you will), this lower amount of blue light must pass through more air to reach the surface (since it's hitting at an angle) and be hugely scattered, giving a permanent yellow/red sky. That being said, this only applies if there is not a compound coloring it; nitrogen dioxide and most hydrocarbons react with oxygen to form compounds that tint the atmosphere reddish-brown (this is the same mechanism that produces smog on Earth). You cannot place much of either in your atmosphere, simply because they tend to react with oxygen, but as smog proves on Earth, you only need a small amount to color the sky.

I've been doing a little research regarding planets around red dwarves. Sadly, I'm not a meteorologist and the data now has my head spinning, but apparently you only need 100 mb of CO2 to keep the nightside warm enough to prevent the whole atmosphere from freezing over, and with at least 1000 mb of CO2 you could keep the nightside warm enough to maintain liquid water. That being said nitrogen oxides and hydrocarbons are both more effective greenhouse gasses than CO2...

Everything I've seen thus far seems to agree that there will be such a storm at the center of the tropics. Moreover winds will tend to form cells rotating around the point where the sun directly hits the equator; winds from the nightside will run along the surface towards it, rise near the storm, then travel back to the nightside, with slight shifting towards the left due to Coriolis forces (the planet is rotating, even if said rotation is synchronized with its orbit). Nightside temperatures in general are close to uniform, and depending on the exact atmospheric composition, you may have habitable temperatures stretching all the way into the storm. Life can exist there; it just wouldn't be the nicest place for humans to tread.

~Malicious-Monkey Jan 27, 2013 Hobbyist Traditional Artist

Hey, thanks for all the great feedback. It's amazingly helpful. Do you mind if I take this conversation to Spec so the rest of them can join in the discussion?

~Zerraspace Jan 27, 2013

Here's my source for the levels of CO2 needed in the atmosphere: [link]

Here's my source for wind movement and temperature variations: [link]

~Zerraspace Jan 27, 2013

Feel free; I'm glad to finally be contributing to your project.

~Malicious-Monkey Jan 27, 2013 Hobbyist Traditional Artist

If anyone else wants to follow the discussion, the thread is over here -------> [link]

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