Editing System generator (section)

== Gross Properties ==

===Gravity and Surface Composition===
{| class="wikitable"
|+
Planet Body (Size and Mass); D10
! Roll
! Meaning: Rocky Planet
|-
! 1
|'''Small, Light:''' The already-small world is low in metals, and so has even lower mass than it appears.
|-
! 2-3
|'''Small:''' Too small for strong gravity or abundant resources. Subtract 5 from the result of its Gravity roll.
|-
! 4
|'''Small, Dense:''' As ''Small'' but with higher gravity and more mineral resources available.
|-
! 5-7
|'''Large:''' Worlds of this size can range across a vast spectrum of possible types.
|-
! 8 
|'''Large, Dense:''' As ''Large'' but with higher gravity and more mineral resources available.
|-
! style="white-space: nowrap;" | 9-10
|'''Vast:''' Huge and voluminous, worlds of this type strain the upper edges of the possible size for a single world. Such planets tend to be of middling density, as they are already more massive than is common. Add 5 to the result of its Gravity roll.
|-
! Roll
! Meaning: Gas Giant
|-
! 1-2
|'''Gas Dwarf:''' Considerably more massive than most rocky planets, but small for its kind. Subtract 5 from the result of its Gravity roll.
|-
! 3-8
|'''Gas Giant:''' Vastly more massive than any rocky world, with accordingly powerful gravity.
|-
! style="white-space: nowrap;" |'''9-10'''
|'''Gas Titan:''' The titans among gas giants are larger than some small stars, and may even be 'Brown Dwarfs', arguably closer to being stars than planets (the difference is that a true star can maintain fusion reactions, Brown Dwarfs can't). Roll another ''D10''; on an ''8+'' this is a Brown Dwarf; its Gravity roll is an automatic ''10'' and its moons are generated as if they were one Solar Zone closer to their star. On a ''1-7'' it is an 'ordinary' titan and merely adds 3 to its Gravity roll.
|}

'''Dense''': A Dense planet adds 5 to the result of its Gravity roll. Increase the Abundance of any Mineral Resources it holds by 10.

'''Light''': Subtract 2 from the result of its Gravity roll, and halve the Abundance of any Mineral Resources it holds.

{| class="wikitable"
|+
Gravity; D10
!Roll
!Meaning: Rocky Planet
!'''Orbital Feature Rolls'''
|-
! style="white-space: nowrap;" | -6-2
|'''Low Gravity:''' Subtract 10 from its rolls for Orbital Features and subtract 2 from its roll for Atmospheric Presence. Maneuvering on this world may be difficult for those not accustomed to it.
|D2
|-
! 3-8
|'''Normal Gravity:''' Approximately the same gravity as Terra's standard 1 G. No effects.
|2D3-1
|-
! 9+
|'''High Gravity:''' Add 10 to this planet's rolls for Orbital Features and add 1 to its roll for Atmospheric Presence.
|D6+1
|-
!Roll
!Meaning: Gas Giant
!
|-
! style="white-space: nowrap;" | -4-2
|'''Weak:''' Weak gravity for a gas giant, though still stronger than almost all rocky planets. Subtract 5 from its rolls for Orbital Features.
|D6
|-
! 3-6
|'''Strong:''' Enormous gravity field, normal for its type. No effects.
|D6+D3
|-
! 7-9
|'''Powerful:''' Objects well beyond its immediate surroundings feel its pull. Add 5 to its rolls for Orbital Features.
|2D6
|-
! 10+
|'''Titanic:''' Even the system's star is affected by this world's gravity. Add 15 to this planet's rolls for Orbital Features.
|3D6
|}

===Air and Orbit===

{| class="wikitable"
|+
Orbital Objects; D100
!Roll (Rocky)
!Roll (Gas)
!Feature
|-
! style="white-space: nowrap;" | -9-30
! style="white-space: nowrap;" | -4-15
|'''No Feature:''' Nothing interesting added to the planet's orbit.
|-
! 31-45
!
|'''Large Asteroid:''' An asteroid large enough to be detectable by sensors, but not visible except as a fast-moving star to the naked eye, occupies a stable orbit around this planet. 
|-
! 46-60
! 16-40
|'''Planetary Rings(Dust):''' A wide ring of fine particles circles the planet. This isn't a hazard to navigation, but does make sensor readings noisier. If this is rolled multiple times, enlarge the rings rather than adding more sets of rings. Sensor readings get progressively harder as the rings get larger.
|-
! 61-90
! 41-70
|'''Lesser Moon:''' Large enough to have a noticeable gravity well, but smaller than even a small rocky planet and often not massive enough to be a proper hydrostatic spheroid. Roll ''D10''; on a ''6+'' it is rich enough in minerals to count as a Mineral Resource, generated normally but with Abundance reduced by 5. 
|-
!
! 71-85
|'''Planetary Rings(Debris):''' A narrow band of asteroids or chunks of ice extends out around the Gas Giant. The spread is limited enough that they can be avoided with a short detour, but if the detour is skipped, navigating them is like navigating an Asteroid Field system feature. If this is rolled multiple times, increase the size and density of the rings, making the needed detour longer and the navigation through them harder.
|-
! style="white-space: nowrap;" | 91-100+
! style="white-space: nowrap;" | 86-100+
|'''Moon:''' A true moon, massive enough to form  a proper hydrostatic spheroid. Generate this as a new Rocky Planet, but its mass must be less than its primary. If the primary is a rocky world, the moon's Body must be less than the primary's Body. If the primary is a gas giant, the satellite's Body must be less than (the primary's Body+4).
|}
For a gas giant, you're done here. For rocky planets, continue to generating its atmosphere and biosphere.
{| class="wikitable"
|+
Atmosphere Density; D10
! Roll
! Meaning
|-
! style="white-space: nowrap;" | -4-1
|'''None:''' No atmosphere,or almost none. Operating on its surface requires the usual tools and protection for working in vacuum.
|-
! 2-4
|'''Thin:''' The atmosphere is very thin, making any dangers from toxic gases reduced but also making it very difficult to breathe.
|-
! 5-9
|'''Moderate:''' The density of the air is normal or nearly so, and imposes no extra strain.
|-
! 10+
|'''Heavy:''' Air so thick it is crushing. Any dangers from toxic gases are more severe, and breathing the dense, heavy air is stressful, preventing unaugmented humans from getting proper rest.
|}
If no atmosphere, you're done here. If there is one, continue:
{| class="wikitable"
|+
Atmosphere Composition; D10
!'''Roll'''
!Meaning
|-
! 1
|'''Deadly:''' You're basically swimming in an acid ocean. Even with total environmental seals, you're probably living on borrowed time. If the atmosphere is ''Heavy'', you're ''definitely'' living on borrowed time.
|-
! 2
|'''Corrosive:''' Poisonous to breathe and deadly on contact. If you're a SPEHSS MARINE you can probably make it a minute or two without a total environmental seal, but without it you're probably living on borrowed time.
|-
! 3-5
|'''Toxic:''' Poisonous to breathe, but only mildly harmful to walk through. You'll need a rebreather but not a full isolation suit.
|-
! 6-7
|'''Tainted:''' Trace elements will be harmful to breathe with long-term exposure, though spending a week or so breathing it shouldn't have much effect. Not great for colonization but fine for short-term exploration.
|-
! style="white-space: nowrap;" | 8-10
|'''Pure:''' Rejoice! The air is clean and breathable by even the frailest of constitutions.
|}
If the atmosphere is ''Toxic'' or worse, you're done here. If it's at worst ''Tainted'', continue to the biosphere.

===Biosphere===

{| class="wikitable"
|+
Climate; D10
! colspan="3" |'''Roll (Zone)'''
! rowspan="2" | Meaning
|-
! IC
! PB
! OR
|-
! 1-6
!
!
|'''Burning World:''' The most moderate climate on the planet at night is still hotter than a nuke in the Sahara
|-
! style="white-space: nowrap;" | 7-9
! 1-3
!
|'''Hot World:''' Most of the planet is incredibly hot, but some sheltered patches are merely as hot as the Sahara.
|-
! 10
! 4-7
! 1
|'''Temperate World:''' Praise the God-Emperor, this world is mostly habitable.
|-
!
! style="white-space: nowrap;" | 8-10
! 2-4
|'''Cold World:''' Most of the planet is incredibly cold, but some sheltered patches are merely as cold as Siberia.
|-
!
!
! style="white-space: nowrap;" | 5-10
|'''Ice World:''' Blizzards in Antartica got nothing on this planet.
|}

If the planet has no atmosphere, its climate is instead extreme, based on the Zone it inhabits. Inner Cauldron airless planets are Burning Worlds, Outer Reaches Ice Worlds. Airless worlds in the Primary Biosphere can be either, either decided at random (use 1d2) or based on which other Zone their orbit is nearer to. Roll on the Water and Life table next, using the column corresponding to the planet's type. If the world is Burning or Ice-bound and a result indicates it bears extremophile life forms, the world bears 'Trapped Water' as described in that result, and additionally you may choose to ignore the life rolled and treat it as a pure Trapped Water result. You may optionally roll even if the world has no atmosphere or a toxic atmosphere, in which case it may bear extremophile organisms which do not make use of water in their biology. 

{| class="wikitable"
|+
Life and Water; D10
! colspan="4" | World Type:Roll
! rowspan="2" | Water and Life
|-
!Temp.
!Hot
Cold
!Burning
Ice
!Toxic
Airless
|-
!<0
!<2
!<5
!<6
|'''Hostile''': Not only is there no water, it would be difficult or impossible to introduce any.
|-
!0-1
!2-3
!6
!7-8
|'''Inhospitable''': There is no water or life to be found on this world.
|-
!2-3
!4-5
!7
!
|'''Trapped Water''': Whether vapor, ice, or mixed with severe contaminants, water exists here but is very hard to come by.
|-
!4-5
!6-7
!
!
|'''Lifeless Oceans''': Liquid water is readily available, but no native life exists. (Yet?)
|-
!6-7
! style="white-space: nowrap;" | 8-9
!
!
|'''Minimal Ecosystem''': Native life exists, but it is limited in form or distribution and without much variation.
|-
!
!
! style="white-space: nowrap;" | 8-9
! style="white-space: nowrap;" | 9-11
|'''Minimal Extremophiles''': Native life exists in the extreme conditions, in isolated pockets.
|-
! style="white-space: nowrap;" | 8-11
!10+
!
!
|'''Thriving Ecosystem''': Native life is diverse, plentiful, and wide-ranging; most or all parts of the planet have native species.
|-
!
!
!10+
!12+
|'''Thriving Extremophiles''': Despite the harsh conditions, native life is plentiful and wide-ranging
|-
!12+
!
!
!
|'''Abundant Ecosystem''': Native life is so rich that it has numerous properties uniquely useful to the galaxy, if you can find them
|}

Regardless of whether the world bears life or water, next roll for the distribution of its land. 

{| class="wikitable"
|+
Land Distribution; D10
! colspan="3" |World Type: Roll
! rowspan="2" |Meaning
|-
!Hostile
Inhospitable
!Trapped Water
Extremophiles
!Lifeless Oceans
Standard Ecosystem
|-
!1-9
!1-7
!
|'''Unbroken Surface''': The planet's crust is uniform without substantial cracks or segments
|-
!
!
!1-3
|'''Supercontinent''': All dry land is one contiguous cluster, with only a few small islands set apart
|-
!10
!8-9
!4-6
|'''Few Continents''': D3+1 landmasses make up the land surface, divided by oceans or something more exotic
|-
!
!10
! style="white-space: nowrap;" | 7-10
|'''Many Continents''': 2D3 landmasses make up the land surface, with many islands and archipelagos besides.
|}