DETERMINE MAIN WORLD

The Main world of a solar system is its most hospitable world. The idea is that the Main World is the probable main point of interest for a Traveller entering that system and that it can be generated by the Referee before worrying about the rest of a system. For the Main World, Determine Main World rolls are made with Adv+2.

O, B, and A stars will not have habitable worlds and are unlikely to be visited except by the rare scientific probe or expedition assembled to study such systems. It is probable that such stars have no fully formed planets.

Roll 2D6 for Type on World Type Table A. Then roll 2D6 for size. F stars have Adv+2, and G stars Adv+1, on both rolls, in addition to the bonus from being a Main World.

World Type Table A

	Type (Roll 2D6)
Size (Roll 2D6)	2	3-5	6-12
Size (Roll 2D6)	Habitat	Dwarf World	Terrestrial World
2	1 MVT	0.1 LM	0.1 EM
3	3 MVT	0.2 LM	0.2 EM
4	10 MVT	0.3 LM	0.3 EM
5	30 MVT	0.5 LM	0.5 EM
6	100 MVT	0.7 LM	0.7 EM
7	300 MVT	1.0 LM	1 EM
8	1 GVT	1.5 LM	1.5 EM
9	3 GVT	2 LM	2 EM
10	10 GVT	3 LM	3 EM
11	30 GVT	5 LM	5 EM
12	100 GVT	7 LM	7 EM

CM Ceres Mass which is 9.4 x 1020 - 0.013 LM, 938 Peta Tons.

LM Lunar Mass which is 7.3 x 1022 - 0.012 EM, 78.24 CM

EM Earth Mass which is 5.9 x 1024 - 6,365 CM, 81 LM

MVT - Mega Volume Tons. A Volume Ton is 1 cubic meter. 1 Million Volume Tons

GVT - Giga Volume Tons. 1 Billion Volume Tons.

Habitat Main World

The system does not have an inhabited main world. Instead, Volume Tons here represents the size of Habitats stationed in the region of the system’s most habitable world. These habitats don’t have to be one piece, they can be different Habitats, each serving a particular specialized role. The Volume Tons measure the mass allocated for Life Support and Crew. The actual structures and infrastructure can be far more massive than these numbers suggest. If the world is not a Habitat, skip to the appropriate section (See the “Dwarf Planet Main World” text or “Terrestrial Main Word” in this section)

HABITAT POPULATION Table

This is the amount of Volume Tons of Habitat needed per Person, assuming the Main World is a Habitat.

TL	CE TL	VTons to Person
7	6.0	100
8	6.5	70
9	7.0	50
10+	7.5+	30

Determine the number of people the habitat can support according to the table below.

Habitat Maximum Population Table

Maximum Population according to TL / CE TL
TL	7	8	9	10+
CE TL	6.0	6.5	7.0	7.5+
1 MVT	10K	14K	20K	33K
3 MVT	30K	42K	60K	99K
10 MVT	100K	140K	200K	333K
30 MVT	300K	420K	600K	999K
100 MVT	1M	1.4M	2M	3M
300 MVT	3M	4.2M	6M	9M
1 GVT	10M	14M	20M	33M
3 GVT	30M	42M	60M	99M
10 GVT	100M	140M	200M	333M
30 GVT	300M	420M	600M	999M
100 GVT	1B	1.4B	2B	3B

MVT - Mega Volume Tons is 1 Million Volume Tons. A Volume Ton occupies 1 cubic meter.

GVT - Giga Volumen Tons. 1 Billion Volume Tons.

Habitats have a Minimum TL9.

PVT - Peta Volumen Tons. Trillion Volume Tons.

Vtons to Person

This is how much Volume Tons are needed for Long Term habitation. This is not just empty space but the volume tons allocated for storage of consumables, power, recyclers, processors, medical requirements, and life support.

Long term Habitation

The Maximum Population values from the chart above assumes around 6 months of Habitation without the need for imported resources. The typical Habitat will eventually need maintenance using resources brought in from the outside. A habitat properly built for indefinite habitation will be able to support half this value indefinitely.

Dwarf Planet Main World

These are smaller worlds than your typical Terrestrial Worlds with size measured in Lunar masses. For a Dwarf Planet Main World, roll 2D6 on the Lesser Earth Type Table to get the planet type.

Lesser Earth Type Table

2D6	Lesser Earth Type	Position Modifier
2-7	Carbonaceous	+1
8-10	Silicaceous	+0
11	Metallic	-1
12	Other	+0

Position modifier will be used when rolling on the “Lesser Earth and Disks Zone Table” when determining the position of a Dwarf Planet Main world on page 19.

Carbonaceous Type

This is the most common type of planet material, as it is made of simpler elements and has a lower density. These are Volatile, rich, Lesser Earths. Because they are made of more volatile and lighter material, they are more commonly found in the Cold Zone and beyond

Silicaceous Type

These are like stony Lesser Earths with relatively high density. They are not as light and rich with Volatile Compounds and can be found in the Hot, Habitable, Cold Zone, and Outer Solar System.

Metallic Type

These are the most dense type of lesser Earth. They tend to be found closer to the Sun. They contain heavier elements and are rarer than other types.

Other Type

These are the many different types of lesser earths that do not fall neatly in the aforementioned 3 types.

Terrestrial Main World

The main world is a Terrestrial Planet made mostly of Silica or Rock; and heavier elements like iron; with mass measured in Earth Masses.

DETERMINE GRAVITY Table A

Determine the gravity of the Dwarf Planet or Terrestrial Planet by making a 2D6 roll. Planets of the same mass may have varying gravity if they have differing radii.

2D6	Dwarf Planet	Terrestrial Planet	Habitability
2	0.001 G	3 G	-2.5
3	0.02 G	2 G	-2
4	0.04 G	1.5 G	-1.5
5	0.06 G	1.3 G	-1
6	0.08 G	1.2 G	-0.5
7	0.10 G	0.3 G	-0.5
8	0.12 G	0.4 G	-0.5
9	0.14 G	0.5 G	-0.5
10	0.16 G	0.7 G	+0
11	0.18 G	0.9 G	+0
12	0.2 G	1 G	+0

G3 environments would likely require special training to survive in.