Editing System generator (section)

===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.