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Tom Kalbfus
August 30th, 2009, 04:25 PM
This is an unusual system consisting of 3 G class main sequence stars, one type K2 V star, and two red Class M main sequence dwarfs, and scattered amongst those stars are twelve Earthlike planets. Humanity has been colonizing the stars in the Galaxy for a long time now in slower than light starships. The origins of humankind have been lost to the distant recesses of human memory, the initial era of long duration interstellar has come and gone, and two thousand five hundred years ago, the emmissaries of mankind had found a most unusual star system, a star system with twelve terraformable worlds. The worlds were prompty terraformed by a group of beings called the overlords, the overlords were not human, its not entirely clear what they were, the leading theory is that either they were a group of aliens or perhaps some very advanced machines. The humans on the twelve worlds know very little as the records from that time are fragmentary, and many people were not literate in those days.

At one point after the initial colonization, legends say that the humans were cast out of paradise, most modern historians translate that to mean their devices stopped working for them and humans for the first time in many millenia had to rely on their own skills, and those skills were very meager in those days. Promptly space travel was lost and with that the worlds were isolated from each other for over one thousand years in a new dark age which only recently ended 500 years ago. The last 500 years was an age of discovery and adventure, the reestablishment of space travel, and the contacts renewed between the various branches of humanity on the various worlds of the system.

The system consists of 6 stars, 3 yellow G Vs, 2 red M Vs and 1 orange K2 V star.
Component A is a yellow G2 V class star, it consists of 5 planets and 1 moon, two of them are uninhabitable as they are too close to this star, the third planet is a gas giant with one large Earthlike moon, preceding that gas giant in the L4 trojan point is an Earthlike planet, and following that gas giant is another Earthlike planet with an airless rocky moon. Just beyond the gas giant is a red dwarf (class M5 V) with an Earthlike planet orbiting it at 0.01 astronomical units. Altogether the A component of the Twelve Worlds system has 4 habotable planets.

Component B is also a yellow G2 V class Star, it circles opposite Component A with a mean seperation of 30 astronomical units, which stays fairly constant throughout its entire mutual orbit, this star has seven planets, two of them are uninhabitable because they are too close to their star, one is uninhabitable because its a gas giant, this gas giant is about the size of Jupiter, has 5 airless bodies in orbit around it, and two Earthlike planets preceding it in its L4 trojan point, and two Earthlike planets following it in its L5 trojan point, the habitable planets in this section consist of two pairs of binary planets held apart and seperate in their respective trojan points on opposite sides of the gas giant

Component C is also a G2 V class star with 5 planets, to uninhabitable rocks too close to the star, a lone binary planet orbiting within the habitable zone, and a second red dwarf (class M5 V) with a single planet in close-in orbit further away. for a total of 3 habitable worlds.

Component D: The most remote world in this system is orbiting component D a type K2 V orange dwarf star, the orange dwarf boasts only two planets, one of which is habitable and an asteroid belt further out.

The inhabitants of this solar system are only slightly more technically advanced than we are, the space technology is more advanced as they travel about in their solar system, their electronics is comparable to our own, they have harnessed fusion as a source of energy, but only in huge magnetic confinement reactors. The space propulsion technologies employed are very familiar to us, except these are more developed, loops of superconducting cables are employed for magnetic sails, solar sails are also used with the multiple stars in this system as are fission reactors and ion drives, very large fusion reactors are used on huge ships. On planetside people still get around on ground based cars, and fly in airplanes, space travel is affordable for the wealthy, a typical ticket to travel interplanetary may cast anywhere from 10,000 to 100,000 credits, volume of traffic is low compared to air traffic on a single world., the population of the tweleve World system is something in the neighborhood of 12 to 15 billion people.

Tom Kalbfus
August 30th, 2009, 05:51 PM
The truth is, I'm a very novice writer, I have a lot of good ideas for story settings, with story development, I could use some help. I'm out to have fun mostly, and maybe learn something in the process. One idea I've had with this setting is this: with your standard interstellar milieu, say Star War/Star Trek for example, you have a type of FTL drive to get around the Speed of light limitation, with this setting I've tried to go the other direction by bringing the worlds one would want to visit closer together so a slower than light drive would become viable, and interplanetary commerce, politics, and economics become viable. I think 12 Earth like planets is enough, I haven't come up with names for them and as this collaborative stories section I hope to gain some participation. The technology is very close to what we've got now or what we would understand with present day physics, guns still shoot bullets, maybe larger caliber weapons systems employed in spaceships might use lasers and missiles. Robots exist, but they do not dominate the setting. History is replayed on a multiplanet level.

Here are some notes on the Twelve Worlds System
The first 2 letter code designates the orbit, the first letter indicates the component which the planet or red dwarf orbits, the second digit indicates the number of that orbit from that component, an 'X' indicates it is the component star (red dwarfs don't count as components and are treated as planets instead)
the number after the orbit code is the distance from that component in astronomical units, following this is the object type code, explainatory notes following classifies the object as a mass range, the actual mass of the object follows.

The Twelve Worlds System Traveller Notation
Orbt: Distance: Type : Mass Range
AX: 0.0 Astronomical Units: G2 V (402,035 Earth Masses)
A1: 0.4 Astronomical Units: 7 (0.642 Earth Masses)
A2: 0.7 Astronomical Units: 2 (0.02053 Earth Masses)
A3: 1.0 Astronomical Units: iv (344 Earth Masses)
A3a: 8 (0.943 Earth Masses)
A3-L4: 8 (1.049 Earth Masses)
A3-L5: 8 (1.006 Earth Masses)
A4: 1.6 Astronomical Units: M2 V (117,637 Earth Masses)
A4a: 0.01 Astronomical Units: 8 [I](1.145 Earth Masses)
A5: 2.8 Astronomical Units: Asteroid Belt

BX: 30.0 Astronomical Units seperation from AX: G2 V (396,031 Earth Masses)
B1: 0.4 Astronomical Units: 4 (0.0858 Earth Masses)
B2: 0.7 Astronomical Units: 2 (0.0199 Earth Masses)
B3: 1.0 Astronomical Units: iv (297 Earth Masses)
B3a: 8 (1.003 Earth Masses)
B3-L4: Binary Planet
B3-L4a: 8 (1.163 Earth Masses)
B3-L4b: 8 (0.906 Earth Masses)
B3-L5: Binary Planet
B3-L5a: 8 (1.043 Earth Masses)
B3-L5b: 8 (0.879 Earth Masses)
B4: 1.6 Astronomical Units: 4 (0.133 Earth Masses)
B5: 2.8 Astronomical Units: Asteroid Belt

CX: 90.0 Astronomical Units seperation from A/B center of mass: G2 V (383,950 Earth Masses)
C1: 0.4 Astronomical Units: 7 (0.772 Earth Masses)
C2: 0.7 Astronomical Units: 0 (0.000064 Earth Masses)
C3: 1.0 Astronomical Units: Binary Planet (a/b)
C3a: 8 (0.824 Earth Masses)
C3b: 8 (1.127 Earth Masses)
C4: 1.6 Astronomical Units -> M2 V (120,081 Earth Masses)
C4a: 8 (1.013 Earth Masses)
C5: 2.8 Astronomical Units: Asteroid Belt

DX: 30.0 AU seperation from CX: K2 V (191,796 Earth Masses)
D1: 0.4 AU: 9 (1.254 Earth Masses)
D2: 0.6 AU: 8 (0.929 Earth Masses)
D3: 1.0 AU: Asteroid Belt

Type: Mass
Code: Range (Earths)
0 = up to 0.000244 Earth Masses (Approx Size Range up to 800 km)
1 = 0.000244 to 0.00659 Earth Masses (Approx Size Range 800 to 2,400 km)
2 = 0.00659 to 0.0305 Earth Masses (Approx Size Range 2,400 to 4,000 km)
3 = 0.0305 to 0.0837 Earth Masses (Approx Size Range 4,000 to 5,600 km)
4 = 0.0837 to 0.178 Earth Masses (Approx Size Range 5,600 to 7,200 km)
5 = 0.178 to 0.324 Earth Masses (Approx Size Range 7,200 to 8,800 km)
6 = 0.324 to 0.536 Earth Masses (Approx Size Range 8,800 to 10,400 km)
7 = 0.536 to 0.824 Earth Masses (Approx Size Range 10,400 to 12,000 km)
8 = 0.824 to 1.20 Earth Masses (Approx Size Range 12,000 to 13,600 km)
9 = 1.20 to 1.67 Earth Masses (Approx Size Range 13,600 to 15,200 km)
Gas Giant Classes
i = 0.621 to 16.8 Earth Masses
ii = 16.8 to 77.6 Earth Masses
iii = 77.6 to 213 Earth Masses
iv = 213 to 452 Earth Masses
v = 452 to 826 Earth Masses
vi = 826 to 1,360 Earth Masses
vii = 1,360 to 2,090 Earth Masses
viii = 2,090 to 3,050 Earth Masses
ix = 3,050 to 4,260 Earth Masses
x = 4,260 to 5,750 Earth Masses
Stars
M5 V = 90,847 to 136,438 Earth Masses
K2 V = 189,682 to 274,540 Earth Masses
G2 V = 312,809 to 402,659 Earth Masses