Traveller Worlds


Science Fiction Adventure

in the Far Future

Rendering ...

World Name:

Name your world here.


Starport or Spaceport












Law Level


Technology Level


Trade Classifications and Remarks

Orbit Details


Orbit number (decimal) around parent star. This can be adjusted with the arrow buttons.

Orbital Distance:

Adjust orbit with first up and down arrows; adjust the decimal place with the second:

Orbital Period:

Calculated Orbital period in Earth Years

Port Details

Starport Class

Starport Facilities

Size Details

Size UWP value explanation:

What the size digit in the UWP means

Diameter (km):

Equatorial Diameter of world in km

Jump Point (km):

Distance required to safely jump. This distance includes clearing a planet's jump point for satellites, and the star.

Time to Jump Point at ...:

Time to jump point at standard Gs from Maneuver Drives.

Density Type:

Basic internal materials of world.

Density (Earth=1):

Density where Earth = 1

Mass (Earth=1):

Mass in Earth Masses - calculated

Gravity (G):

Calculated gravity in Gs (Earth=1)

Rotational Period (Hours):

Rotational Period in Earth Hours. If Tz or Lk, rotation period & orbital period are the same.

Atmosphere and Temperature details

Atmosphere UWP digit explanation

Atmospheric Pressure

Atmospheric Pressure in Earth Atmospheres

Atmospheric Composition

Description of Atmopsheric Composition


Albedo is the proportion of energy reflected into space (between 0 and 1)

Greenhouse Effect

The Greenhouse retention of heat by the atmosphere as a multipler (e.g. 1.05 = 5%)

Axial Tilt (degrees)

Axial Tilt - used to calculate seasonal variations

Base World Temperature

The average temperature for the world calculated using stellar luminosity, distance from the star, greenhouse effect and albedo.

Average Daytime Temperature

The base temperature plus the typical temperature rise caused by the sun during the day. The average daily maximum temperature.

Average Nighttime Temperature

The base temperature minus the typical temperature fall during the night. The average nightly minimum temperature.

Summer Increase

The maximum increase of temperature in summer when a hemisphere is tilted towards the parent star.

Winter Decrease

The maximum decrease of temperature in winter when a hemisphere is tilted away from the parent star.

Upper Temperature Limit

Daytime temperature plus summer increase.

Lower Temperature Limit

Nighttime temperature minus winter decrease.

Hydrosphere Details

Hydrographic Percentage

More precise percentage of planet covered in liquid.

Surface Liquid Composition

Are you SURE that's water!?

Native Life?

The world has or does not have native life. Regardless, the world may have imported species.

Seismic Stress

Seismic Stress minus 4 is the daily chance on 4D for an earthquake, Mod +2 if on a fault line.

Natural Resources

Agricultural Wood, meat, spices, fruit, grain
Ore Iron ore, copper ore, tin ore, silver ore, alumina, rare earths
Radioactive Uranium ore, thorium ore, radium ore
Gem and Crystal Diamond, emerald, ruby, quartz, opals, granite, sapphire, amethyst
Petrochemical Natural gas, oil, coal

Processed Resources

Agricultural Liquor, dairy products, canned fruit, frozen vegetables, prepared food and sauces, confectionary, beverages, smoking products
Alloys Steel, tungsten, iron, copper, bronze, brass, silver, aluminium
Agroproducts Textiles, polymers, pharmaceuticals

Manufactured Resources

Weapons Firearms, ammunition, blades, body armor
Mechanical Parts and Goods Tools, vehicle parts, vacc suits, white goods
Heavy Equipment Aircraft, ATV, AFV, machine tools, farm machinery
Electronics Computers, electronic parts, cybernetic parts, computer parts, security systems, communicators
Gravitics Anti-grav modules, grav belts, gravitic communicators
Information Scientific, Legal or Commercial data whether in paper or electronic forms.

Population Details

Population Digit from UWP

Population Multiplier

Total Population

Intelligent Life Status

Indication of the (Native) Intelligent Life on this world.



Temperature Table