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Teran System
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| Diakonov | Date: Monday, 18.01.2016, 19:31 | Message # 1 |
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Astronaut
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| Hi, this is my first attempt to make a mod for Space Engine, the best space simulator ever.
Teran is a triple star system (all red dwarfs). Two of them orbiting each other and the third is orbiting both. The pair are both M2V and the third is a M5V. All of them have planets. The stars are:
Teran A (M2V)
Teran B (M2V)
Teran C (M5V)
Teran A and B are 24 AU distante each other. Teran C is 72 AU from the barycenter.
Teran A have more planets. And Teran C have less planets. Most planets have life.
Teran system is also nearer from center of our galaxy than the sun. It's in a special region where there are not so many stars exploding or gamma ray bursts. It's a region where it's possible to exist stable life for long periods of time. Even in our region there are stars that can be a threat to Earth, such as Sirius and we are still alive here. So why not there? It's 4000 Ly distant from the sun I believe...
Being nearer from the galaxy center also means there will be more planets, because Teran system is rich in planets, from gas to rocky planets. There are also many superearths in total. I'm using Universe Sandbox 2 to test the stability of orbits of planets, because for multiple stars it don't work well.
The planets I'll show later, after I've finished them. Well, it's all for now.
The download link will only be available when the mod is finished.
Are Teran orbits realistic? And what the maximum distance in AU for planets of each star?
Edited by Diakonov - Monday, 18.01.2016, 19:37 |
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| Diakonov | Date: Tuesday, 19.01.2016, 04:43 | Message # 2 |
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Astronaut
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| And here's the first system, of Teran C, the smallest one.
1° planet (Hotemia):
This was a gas giant, but lost almost all it's atmosphere and now it's core is exposed. The core developed it's own atmosphere of heavy gases and is a burning hell! 1 Me.
2° planet (Bascovilium):
A gas giant with a big moon (Monis, 0,125 Me) with seas of H2SO4. Life here is dramatically different from our planet. It's based on compounds made os sulfur, silicon, oxygen, alluminium and a series of metals. The air of Monis is mostly N2 with some O2 and SO2. The planet itself has many species of floaters and biochemistry more similar of ours. 0,75 Mj.
3° planet (Ozimen):
An oceania planet with 17,5 Me, a bit more massive than Neptune but with a liquid surface and endless storms. It's main moon, Nakne (0,25 Me), is a hot moon, having water mixed with ammonia and an atmosphere rich in greenhouse gases. Intelligent life is present here. There's another moon called Ksomia that is similar, but cold, still not frozen.
4°planet (Titumis):
This is a truly poisonous planet (for humans), the air is rich in sulfur, chlorine and nitrogen compounds, giving it's color. Intelligent life is present here too. Seas also have ammonia in water and metallic compounds dissolved. 7Me.
5º planet (Makjo):
A hotter version of Titan, bigger, with rings and... complex life. 3,75 Me.
6º planet (Plugot):
Similar to Makjo, but colder. Complex life here is present but more scarce. 1,5 Me.
7º planet (Felnios):
A mixture of Pluto and Europa, big enough to keep some interior heat. There's a global ocean but is very deep from the icy surface. 0,25 Me.
And to finish...
Huge comet tails!
Teran C is almost complete, only need some adjustments. Later I'll show Teran B system.
Edited by Diakonov - Tuesday, 19.01.2016, 05:00 |
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| Watsisname | Date: Tuesday, 19.01.2016, 09:17 | Message # 3 |
 Galaxy Architect
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| Very nice work so far! However, this system is too crowded. In particular, C is too close for the separation between A and B. The stellar orbits alone would be unstable on a timescale of only tens of thousands of years. Their separations and eccentricities will shift as angular momentum is exchanged, the planetary systems around A and B would be destroyed, and then the whole system will turn into 3-body chaos with stars being swapped, ejected, or collided.
So I would suggest moving Teran C farther out, something like triple its current orbital distance. The planetary orbits are also too tightly spaced. Either remove some or spread them out more. A and B may also need to be separated more for their planetary systems to be stable -- I'm not certain of that.
Looking forward to seeing the other planetary systems. 
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| Diakonov | Date: Tuesday, 19.01.2016, 13:27 | Message # 4 |
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Astronaut
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| As I said I'll have to make some adjustments. Ok I'll do that. I'll spread a bit Teran C planets. But I saw in US2 the orbits are stable, for the planets. I forgot to say that between some of them there are dwarf planets. I also saw the hill spheres of planets, even more the first ones, are not so far out.
Are these orbits better? The pair are 50 AU away and the third star is 500 AU from the barycenter and the ecentricity of them is smaller. I'm thinking to put Teran C closer, about 375 AU, that should be enough. I also saw that planetary systems orbiting red dwarfs tend to be more crowded indeed. There's a very crowded system astronomers discovered.
Edited by Diakonov - Tuesday, 19.01.2016, 14:04 |
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| Diakonov | Date: Tuesday, 19.01.2016, 14:43 | Message # 5 |
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Astronaut
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| Now I'll talk about the difference of configuration of these systems.
Teran A: The most similar to our solar system, rocky inner planets and gaseous outer planets.
Teran B: The first planets are gaseous, with the exception of the first, that is the core of a gas giant, the middle planets are rocky and the outer are icy.
Teran C: As described before.
I saw that most planets in red dwarfs tend to be superearths. Gas giants in Teran stars are less massive than Jupiter.
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| Watsisname | Date: Tuesday, 19.01.2016, 18:40 | Message # 6 |
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Galaxy Architect
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| Quote Diakonov (  ) I forgot to say that between some of them there are dwarf planets.
Ah, okay. That should help, but I'm still a bit concerned, mainly with the inner planets. I don't think I'd want to rely on an n-body simulation like US2 to check for stability here. That's good for making sure its stable over a few hundred or thousand orbits, but really you want to be sure it's stable for millions to billions. Essentially you want all objects to be at least five mutual Hill Sphere's apart to be stable on timescales greater than millions of orbits.
If you could list the mass of the star (I think it's about 0.3MSun or thereabouts?), and the masses (in Earth's) and semimajor axes (in AU) of each planet and dwarf planet, I could crunch the numbers to make sure they're stable, or if not how you might improve them. I understand you'll want certain planets to be at certain distances from the star so that they have the temperatures and properties as shown, and that shouldn't be too hard to maintain.
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| Diakonov | Date: Wednesday, 20.01.2016, 03:08 | Message # 7 |
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Astronaut
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| Ok...
Teran C: 0.3 MSun
Hotemia: 1 Me, 0.01 AU
Bascovilium: 240 Me, 0.1 AU
Ozimen: 17.5 Me, 0.4 AU
Joremia: 0.05 Me, 0.6 AU
Titumis: 7 Me, 0.8 AU
Logromo: 0.025 Me, 1 AU
Makjo: 3.75 Me, 1.2 AU
Fauk: 0.01 Me, 1.4 AU
Plugot: 1.5 Me, 1.6 AU
Felnios: 0.25 Me, 2 AU
Maurin: 0.005 Me, 2.3 AU
Dwurf: 0.00375 Me, 2.5 AU
Molskwa: 0.0025 Me, 2.7 AU
The system appears crowded because systems in dim red dwarfs tend to have smaller planetary orbits, according to the observations of Kepler telescope.
Edited by Diakonov - Wednesday, 20.01.2016, 03:23 |
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| Watsisname | Date: Wednesday, 20.01.2016, 03:32 | Message # 8 |
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Galaxy Architect
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| Oh, those are much more spread out than I had thought. I was under the impression that a lot of the planets were within like half an AU. So yeah, that should be no problem. Sorry for the confusion!
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| quarior14 | Date: Wednesday, 20.01.2016, 17:19 | Message # 9 |
 World Builder
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| The system looks good and complete from the screenshots, I'll probably test it as soon as it becomes available .
Quarior
Edited by quarior14 - Wednesday, 20.01.2016, 17:20 |
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| Diakonov | Date: Thursday, 21.01.2016, 01:55 | Message # 10 |
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Astronaut
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| An update for Teran C system.
Makjo (5Me), Plugot (3Me) and Felnios (1,5Me) now have higher masses;
Felnios is no more the outermost planet, some more planets were added;
Felnios now has seas of liquid nitrogen and an atmosphere of hydrogen, but is still a rocky-icy world, not a gas bag.
Felnios. See the bright milky gray areas? Those are the nitrogen seas.
You can see there's not a defined division between the seas and icy surface. The seas are milky and between them and the coast there's a region semi-dry and semi-wet.
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| Diakonov | Date: Thursday, 21.01.2016, 20:03 | Message # 11 |
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Astronaut
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| There's something I wanted to know. What makes the haze of Titan is the ultraviolet radiation from the sun and possibly radiation from Saturn. But if a titan-like world orbited a M2V or M5V star, because such stars only produce ultraviolet with most intensity only during flares, but in the case of Teran stars, those flares are not so frequent and intense, does this means that worlds like Titan orbiting any Teran star will have less haze and a more transparent atmosphere? Does smaller red dwarfs have more flare intensity and frequency than bigger red dwarfs? For example, all Teran stars have about 5 billion years, a bit older than sun. Teran A and B have similar flare intensity and frequency, but Teran C is different from the binary pair, so flares should happen in a different way.
Is there a way to calculate the intensity and frequency of flares according to the star mass and age?
Edited by Diakonov - Thursday, 21.01.2016, 20:05 |
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| Lucas0231 | Date: Wednesday, 27.01.2016, 12:39 | Message # 12 |
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| Felnios is beautiful !
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| Diakonov | Date: Wednesday, 27.01.2016, 17:11 | Message # 13 |
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Astronaut
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Brazil
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| I've changed some minor things in Teran C system. Now Felnios has rings and is a bit brighter. Teran C has 7 planets.
I still don't know how to change the ring color.
The comets orbits of Teran C.
Now it's time to show Teran B system...
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| quarior14 | Date: Wednesday, 27.01.2016, 17:47 | Message # 14 |
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World Builder
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| Quote Diakonov ( ) I still don't know how to change the ring color.
It is simple, to make a ring with custom color, it should be a drawing file (.png for example) with a software that can transparency (Paint.net (free)) and that this file has as dimension 2 in height and 512 in width (512 x 2). That is at the time that the ring is lit and the lower at the time that there less lighting but not when it's all black. Then, with transparency (alpha), it determines whether or not it passes light, she is high, less light passing (at 255) there and instead, it lets all the light. Otherwise for the colors, the colors of your choice. I put my ring custom below as an example (Selta on my mod Blackeshelsystem), the file and a screenshot in Space Engine.
File ring.png :
Screenshot in Space Engine :
Quarior
Edited by quarior14 - Sunday, 07.02.2016, 17:26 |
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| Diakonov | Date: Wednesday, 27.01.2016, 19:13 | Message # 15 |
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Astronaut
Group: Users
Brazil
Messages: 69
Status: Offline
| Now we go to Teran B.
Teran B is the second bigger system of Teran, and it's the inverse of our system.
Brakma:
The first planet is the core of a gas giant, so close to the star it lost almost all it's atmosphere. Most of the surface is molten and the part not molten is due to metal-rich material. Temperature is around 1565°C. The air is so hot that near the surface is redder.
Tropkmash:
A sulfur-rich gas giant (0,75 Mj) with 3 moons, all of them similar to Venus in their environments. The inner (Fornix) is the hottest, 1450°C and is blue. The second (Wensian) have 750°C and is green (air rich in sulfur and chlorine). The third (Trandor) is yellow, the most similar to Venus and have temperature of 435°C. None of them are habitable, except the planet itself, that has floaters in the upper and colder regions of the atmosphere. The first and bigger moon is the most massive, a bit more than Mars and the smallest is a bit more massive than our moon. Even being small they have dense atmospheres, due to the intense volcanism on them.
Dominasi:
Another sulfur-rich planet but cold, also has life and is a bit more massive than Jupiter.
The first moon (left) is Gromius. Has seas of H2SO4, the air is similar to Earth but has lots of SO2, so the creatures inhale oxygen and exale SO2 instead of CO2. The colorful surface indicates that. Those colors are vegetation. The second moon (middle) is Narshad, has water instead of sulfuric acid, but the air is greenish due to some sulfur and chlorine compounds. It also has life and the pink surface is the evidence, the pinkish vegetation. It's a world inhabited by men similar to fish, and they're amphibious, breathe both in water and air. The left and last moon is Pekscleid, very similar to Mars, but with denser air. It has lot's of water in ice form.
Mashtar:
Mashtar is the most massive superearth (7,5 Me), but still not a gasbag like Neptune, instead, a rocky world with a dense atmosphere, almost venusian, but colder (60 atm). There are floating whales there and very strong men with long hairs. They have a redder skin and hair too. They are similar to those Sayajins (Dragon Ball series). Vegetation is multicollored but tend to blue or lillac and and seas are orange-brown because it's a solution of water-ammonia with metals dissolved. The air is brown due to high concentration of oxidated nitrogen compounds such as NO2 and N2O. Phosphine is also present. Temperature is around 70°C. It's moon is called Anshtar and have similar environment, but is cold (-50°C) and 1,5 atm. There's also Mashtar ring rich in organics and dust and a very small moon called Asteroni, near the rings.
Djinmatsu:
Very similar to Mashtar, but at near 0°C. A colder version of Mashtar with 5Me and 30 atm. Vegetation has a light difference in color. It also has rings and a big moon (Jameran), similar to Mars but smaller (but the air is a bit denser due to extreme volcanism). Intelligence life in this planet is also present.
Parekmina:
A third version of Mashtar, even colder (-70°C) and smaller, with 2,5 Me and 15 atm (although gravity here is more earthlike). Vegetation here is more purple and the seas bluer due to less concentration of minerals. The rings are a mixture of organics and ice materials. It's moon, Crix, even though smaller than Jameran and having more tenue atmosphere, is hotter due to the extreme volcanism. Volcanism is so extreme in Crix that makes the air green rich in sulfur and chlorine compounds, making that moon a bit hotter than the planet itself.
For now, it is. Later I'll show the outermost worlds of Teran B.
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