- As with variants in gravity, a change in atmospheric conditions can cause major problems for characters.
- Some atmospheres (breathable or not) contain corrosive chemicals and gases.
- The sudden decompression of a starship, vehicle, or other object can be dangerous to creatures inside.
Table: Decompression Times
- Thick atmospheres are those that contain a more dense concentration of...
- Planets with thin atmospheres have less oxygen per breath than the standard Earth atmosphere.
- Some atmospheres (breathable or not) contain toxic gases that are debilitating or lethal to some or all forms of life.
- Despite some popular myths, moving into a vacuum does not cause the body...
- The force that gravity exerts on a person determines how they develop physically...
Attack Roll Penalty
- Creatures take a -2 penalty on attack rolls in a low-gravity environment...
- A creature's normal carrying capacity is doubled in a low-gravity environment.
Damage From Falling
- Creatures do not fall as quickly in a low-gravity environment as they do in a normal- or high-gravity environment.
- In a high-gravity environment, the pull of gravity is significantly greater than that which we experience living on Earth.
- Long-term exposure to low-gravity conditions can cause serious problems when returning to normal gravity.
- In a low-gravity environment, the pull of gravity is significantly less than what we experience living on Earth.
Modified Bull Rush Rules
- A creature affected by a bull rush is pushed back 10 feet, plus 10 feet...
- " Normal gravity" equates to gravity on Earth. Environments with normal...
Skill Check Bonuses
- Creatures in a low-gravity environment gain a +10 bonus on Strength-based...
Space Adaptation Syndrome
- A creature exposed to weightlessness must make a Fortitude save (DC 15) to avoid the effects of space sickness.
- A creature's speed increases by +5 feet in a low-gravity environment.
Weight Vs. Mass
- While an object in zero gravity loses weight, it does not lose mass or momentum.
- Creatures in a zero-gravity environment can move enormously heavy objects.
- Radiation can be naturally or artificially produced.
Table: Radiation Exposure
Table: Radiation Sickness
Treating Radiation Sickness
- Radiation sickness is considered a treatable disease that can be cured...
- A star system can contain one star or multiple stars.
Black Dwarf Stars
- Black dwarf stars completely burn out after expending their fuel.
- Black holes are stars that have expended their fuel sources and exploded in a massive supernova.
Brown Dwarf Stars
- In many ways, the brown dwarf is not even a star. Brown dwarf stars are...
Degree Of Ionizing Radiation
- Ionizing radiation-radiation that breaks down atoms within living tissue-is common in space.
- The chief classifications of hospitable stars are F, G, and K.
- Class O, B, A, and M stars are the least likely to support planets capable of hosting human life.
- A neutron star is a large star that has exhausted its fuel source but hasn't collapsed in on itself.
Number Of Planets
- The number of planets in a given star system can be determined by rolling on Table: Star Systems.
- Most red supergiants begin their lives as average-sized stars.
- Stars are classified using a lettering system that describes the star and gives information about its type.
Table: Star Systems
White Dwarf Stars
- A white dwarf star is so much smaller than a neutron star that it does not have the mass to collapse in on itself.
- Two types of stellar hazards can create higher-than-normal levels of ionizing radiation: solar flares and cosmic rays.
- Cosmic rays, unlike solar flares, cannot be predicted.
- Solar flares release tremendous amounts of electromagnetic energy (including...
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