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Silvanus V2 by Hyrotrioskjan Silvanus V2 by Hyrotrioskjan
Silvanus, a moon 42 lightyears away from earth, and a hotspot of biodiversity in our galaxy.
It's the home of an strange flora and fauna. Swimming forests of gigantic size, pseudoarthropods which dominating the land and the air, eyless vertebrates which rule the global ocean beneath and small but wonderful Cuspipoda crawl everywhere.

Edit: due to new information some basic things about this solar system will change, I never really figured out the astrophysics behind Silvanus because I didn't knew how to calculate the important data. 

A cross-section through the biosphere:

Work on black paper:
And on brown paper:
South pole fauna assemblage: hyrotrioskjan.deviantart.com/a…

flying pseudoathropods: hyrotrioskjan.deviantart.com/a…
flying pseudoathropods 2: th06.deviantart.net/fs71/200H/…
Pachytholids and more: th00.deviantart.net/fs71/200H/…
A hunting Sonticapalma: hyrotrioskjan.deviantart.com/a…


Primitive vertebrates: hyrotrioskjan.deviantart.com/a…
Vertebrates with jaws: hyrotrioskjan.deviantart.com/a…
Small silvanian vertebrates: hyrotrioskjan.deviantart.com/a…
Big predators with backbone: th00.deviantart.net/fs71/200H/…

Glivahirsutatholus hispida: hyrotrioskjan.deviantart.com/a…
Malutholus and Sellaoculus: hyrotrioskjan.deviantart.com/a…
Viridioctopterus and Filixonida: hyrotrioskjan.deviantart.com/a…
Renschinia and Palagalea: hyrotrioskjan.deviantart.com/a…
Libocrus pantherinus: hyrotrioskjan.deviantart.com/a…
Silvanus cleaning crew: hyrotrioskjan.deviantart.com/a…



Add a Comment:
 
:iconrodlox:
Rodlox Featured By Owner Aug 10, 2018
this will probably sound like a dumb question, but I don't remember when you added shallow waters to Silvanus  --  when did you do so?  I can remember you saying the planet had very very deep waters, and the plants floated, and the pseudoarthropods & such lived on the plants & in the seas.

I'm sorry; this doesn't detract from my enjoyment of your literary and artistic work...it just puzzles me.
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Aug 11, 2018  Professional General Artist
The giant "plants" that swim on the surface have of course a lot of material underwater, and dead plant matter that falls down adds to that, creating shallow water
areas by basically building a ceiling of roots etc. over the abyss ;)
Reply
:iconcluetaker:
ClueTaker Featured By Owner Jul 8, 2018  Hobbyist Digital Artist
So, hypothetically...we could be there and survive without a space suit?
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Jul 10, 2018  Professional General Artist
Nope, not for long. 
Reply
:iconcluetaker:
ClueTaker Featured By Owner Jul 12, 2018  Hobbyist Digital Artist
Oh...
Reply
:iconplyendell:
Plyendell Featured By Owner Edited Jul 6, 2017
Are you no longer updating Silvanus? I know I'm late to the party, but this is one of my favorite xenobiology ecosystems, and I'm sad that I haven't seen anything new in a while =(
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Jul 6, 2017  Professional General Artist
Oh, if you would know the mountains of sketches which wait to be turned into finished pieces...
Reply
:iconplyendell:
Plyendell Featured By Owner Jul 6, 2017
Oh man, I can only imagine. But at least you've gotten me excited about the future! Keep up the fantastic work!
Reply
:iconevodolka:
Evodolka Featured By Owner May 1, 2017  Hobbyist General Artist
so is this a real planet?
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner May 1, 2017  Professional General Artist
*moon

Nope
Reply
:iconevodolka:
Evodolka Featured By Owner May 1, 2017  Hobbyist General Artist
sorry for the mix up ^^;
ok thanks for the info, there is a CHANCE it is somewhere out there though which is fun :D
Reply
:iconceratopsia:
Ceratopsia Featured By Owner Mar 31, 2016  Student General Artist
Was für ein tolles Konzept !!! Ich bin begeistert, mehr zu sehen :)
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner May 1, 2017  Professional General Artist
Danke ^^
Reply
:iconceratopsia:
Ceratopsia Featured By Owner May 2, 2017  Student General Artist
You're welcome.
Reply
:iconmunkas02:
munkas02 Featured By Owner Feb 24, 2016  Hobbyist Traditional Artist
can we get a map?
Reply
:iconazrielmoha:
AzrielMoha Featured By Owner Sep 21, 2014
so in Earth the sea area is a bigger than land area is Silvanus the same? and in earth we have carbon based lifeforms..in silvanus what kind these lifeforms made of?
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Sep 23, 2014  Professional General Artist
Silvanian life is carbon based =)

The whole mood is covered with an ocean (Xibalba) but this ocean is covered in large parts (93%) with swimming forests.
Reply
:iconazrielmoha:
AzrielMoha Featured By Owner Sep 24, 2014
and can i ask u something, what happend if a planet have a low gravity with a high atmosphere pressure? is the lifeform in it will grow to a massive size? i'm confused...how about Silvanus? what the maximus size lifeforms in the planet can grow to?
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Sep 30, 2014  Professional General Artist
In this case the size of the animals have not much to do with their planet but more the environment they live in. In the giant forests of Silvanus you need to be "small" to move properly, a elephant would never be able to survive on this soft, unsteady, highly fragmented space.
The same is true for the ocean. In the upper waters there is much food, but also many of the giant roots of the Mundodendralis trees so you can't grow to giant sizes, in the deep sea instead there is enough room for really gigantic creatures but not enough food for a animal bigger than what you find here.
Reply
:iconazrielmoha:
AzrielMoha Featured By Owner Oct 1, 2014
i see, nice work man
Reply
:iconneptunegate:
NeptuneGate Featured By Owner Aug 6, 2014  Hobbyist General Artist
On your previous pic you mentioned the system being 24.8 light years away, here its almost twice as much away from the Earth. So, which version is the correct one? :D
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Aug 7, 2014  Professional General Artist
This is the correct version =)
Reply
:iconneptunegate:
NeptuneGate Featured By Owner Aug 8, 2014  Hobbyist General Artist
Oh, okay, thanks :)

The whole concept for the world is amazing btw. Every single detail you put into. Just thought I share my impressions on it :D
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Aug 13, 2014  Professional General Artist
Thank you very much :hug:
Reply
:iconrandomemaster360:
randomemaster360 Featured By Owner Feb 17, 2014  Hobbyist General Artist
WOW, nice concept. Really like the overall idea of it and the fact that you made it sound so alien yet so familiar to Earth. Nice.
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Feb 19, 2014  Professional General Artist
Thanks a lot :hug:
Reply
:iconrandomemaster360:
randomemaster360 Featured By Owner Feb 19, 2014  Hobbyist General Artist
No problem. I also came up with some extraterrestrial planets a while ago, from which one is a gass giant that has oceans made from liquid Hydrog and giant flying creatures that looks like jellyfishes and other soft invertebrates, which feed on solar energy, the gasses that are in the air and on lighting bolts that come from the storms that constantly rage on the planet, and also another one being a giant planetary desert with seas under it's surface and where most of its inhabitants live.
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Feb 21, 2014  Professional General Artist
Good ideas, I had similar ones but never produced more than sketches =)
Reply
:iconrandomemaster360:
randomemaster360 Featured By Owner Feb 21, 2014  Hobbyist General Artist
Well thanks and hope to see those becoming future pics
Reply
:iconzippo4k:
Zippo4k Featured By Owner Jan 6, 2014
A quick question about your plans with this project: What medium are you hoping to convert these into? Are you hoping to build a website around this world? Are you aiming for a book or an e-book?
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Jan 8, 2014  Professional General Artist
Well, in the moment it will be converted into a large instalation for the yearly exhibition of my art academy =)

Reply
:iconzippo4k:
Zippo4k Featured By Owner Jan 8, 2014
Wait, so you're building an exhibit! Awesome! :D
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Jan 9, 2014  Professional General Artist
Thanks =)
Reply
:iconlieutenantmatt:
LieutenantMatt Featured By Owner Dec 20, 2013  Hobbyist
Is there a story or log of humanity's trek to this planet?
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Dec 20, 2013  Professional General Artist
No, not that I know 
Reply
:iconscopimera:
Scopimera Featured By Owner Dec 12, 2013  Hobbyist General Artist
Could we include this project, giving you credit, in the Saecula Novae wiki (saeculanovae.shoutwiki.com/wik…?
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Dec 13, 2013  Professional General Artist
Ah, that's the hyoid apparatut. Monitor lizards are known for their gular pumping =)
Reply
:iconscopimera:
Scopimera Featured By Owner Dec 13, 2013  Hobbyist General Artist
I think you responded to the wrong comment.
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Dec 14, 2013  Professional General Artist
Ups, yes you are right. Sorry, it was a long day :blushes:
Reply
:icontitanlizard:
titanlizard Featured By Owner Dec 8, 2013

So.....AWESOME!!!

What about the other planets? They have life-forms too?

Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Dec 8, 2013  Professional General Artist
Minos II has microorganisms in its athmosphere :nod:
Reply
:icongrroselli:
grroselli Featured By Owner Dec 8, 2013  Hobbyist General Artist
I'm not entirely sure what you people are speakin in but it ain't vernacular!!! regardless, I truly find it astounding at how in-depth this world is. you've certainly done you're homework! you've thought of everything save one... still waitin on xenomorph reference [something with a spear tipped tail or somethin]Wink/Razz 
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Dec 8, 2013  Professional General Artist
Well I think I have something for you... somewhere... wait a minute... Ah! Here it is! 

Here some old drawings from my first Alien Planet, inter alia with an apex predator which posses a xenomorph tail: hyrotrioskjan.deviantart.com/a…
Reply
:icongrroselli:
grroselli Featured By Owner Dec 8, 2013  Hobbyist General Artist
Dear God... It's frickin awesome! Well done!
Reply
:iconayceman:
Ayceman Featured By Owner Dec 3, 2013
Hmm, a moon like Silvanus in a 12.463 day orbit around Minos II would certainly be in a tidally locked orbit, so the rotation period is also 12.463 days, unless it had major, crust-melting collision in the recent past (<200 My, which wouldn't fit with your evolutionary history). If you want to preserve the eleven hour day, you could either give it a significantly larger orbit (certainly over 40), in which case Minos II has to be located farther away for the orbit to be stable in the long term, or it won't be too long until Silvanus leaves 1/2 of the Hill Sphere of Minos II. However, with increased distance, the start needs to be hotter to be in the classical HZ, which also slightly reduces the Orbital Period for any Semi Major Axis that you choose for Minos II.

Using this HZ calculator here ( astro.unl.edu/naap/habitablezo… ) and this OP calculator ( www.calctool.org/CALC/phys/ast… ), I come up with something along the lines of:

Star type: F6V at 1.2 solar masses and 2.75 solar luminosity; Orbital period of Silvanus around Minos II: ~60 d 4 d (for 2416890 km orbital radius, you get 61.0772 d; Semi major axis of Minos II: ~1.8 AU (1.807 AU sounds random enough); Orbital period of Minos II around the star: ~2.15 y (2.2169 y for 1.807 AU, and a mass of ~50 Earth masses for Minos II); age of the system for the right temperature range: 3.9-4 Gy; still, to have a short 11.452 d rotation period for Silvanus, a collision roughly 1-1.5 Gy ago would be optimal (maybe a moon whose orbit destabilized due to migration, none needed for >30h); also, the solar day on Silvanus would be 11.45875 d for 11.452 d rotation period of the moon and 2.2169 y orbital period of the planet (for regular prograde orbits it's calculated as rotation*(1+rotation/OP)).

With this data you also get a convenient 127.924319843, which is almost 128 solar days per month and 13,25736486, so just over 13 1/4 months per year, and the difference between 127.924319843 and 128 has to be corrected every 13.2135306554 months, which is almost exactly one year, resolved by subtracting a day from the calendar every year.

Of course, you could just have it tidally locked around a much closer orbit (like 36 of 48 hours) and be done with it, but you won't keep the 11 hour day.
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Dec 5, 2013  Professional General Artist
So many mumbers... must think about it longer
Reply
:iconayceman:
Ayceman Featured By Owner Dec 31, 2013
Well I've been doing realistic planetary systems for a while (and cherry picking realistic ones from Space Engine), it's hard getting a really plausible one when it comes to its evolutionary history, especially when you have planets closer in with large moons.

One mistake I made is with the rotation period of Silvanus, I meant to say hours not days, so 11.452 h rotation period and 11.45875 h solar day.
Reply
:iconasaenvolk:
asaenvolk Featured By Owner Jun 2, 2013
so the day is longer than the year? Also you used "," instead of "." and the difference is VERY important. 1,312 Bar is 1000 times greater than 1.312 Bar for example (hint the Mariana Trench, the deepest part of the ocean, is some where between 1091 bar and 1091 bar). The combined increase in air pressure and the much higher levels of oxygen, would indicate that forest fires would likely be much more.. aggressive and dangerous than they are on earth.

The lower gravity and higher air pressure though would mean many more creatures would probably fly than we could find on earth as such an activity would be far less energy intensive.

On thing that I see that would be worrisome is the slow rotation rate of the planet, its Thick atmosphere and the fact that its day length is so incredibly long (longer than its year...477 or so days) would have an intense effect on its weather and ecology. So much so it would essentially have 2 seasons, night, and day and they would be far more intense than earth season and drive horrendous weather storms. Unless you meant 11 and a half hours instead of 11,463 hours.
Reply
:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Jun 2, 2013  Professional General Artist
I don't know how it is used in the USA but we in Germany use "," and "." different around, here everything which comes after a "," is normally smaller than 1. And we use "." only to divide big numbers in more readable parts (example: 129.020= 129020)
So yes. It's not 11463 hours but 11 and nearly a half.
Reply
:iconasaenvolk:
asaenvolk Featured By Owner Jun 2, 2013
Okay, its an English/Deutsch translation issue. Generally when you write things in English (this is not just a US thing), you right numbers out like this 1,000,000 (one million, note the comma every 3 letters), or this 1.1 (one and 1 tenth, or simply 1 point 1). The confusion then of course comes from the fact that the writing is in English but keeping the German number system.

Now don't get me wrong, I am not saying that the Germans do it wrong, its that its different than the English system is all.

My point about the forest fires and flying creatures would still stand though.
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