Help:Conworld
From Aetilc
This page will teach you some factors worth noting in creating your own fictional world
Contents |
[edit] Star Systems
- Stars capable of hosting human habitable worlds ranges in size from 0.5 to 1.4 Solar Masses.
- Hydrogen fusing stars range from 0.08 to 50 solar masses.
- Stars should be no less than 6000 AU apart for their gravity to not affect each other. Otherwise they are a binary or multiple star system.
- Type P binary star system
- Separation should be 0.15 to 6 AU apart and should not be less than 0.1 AU units apart. Otherwise they will become contact binaries.
- Ideal separation between the stars should be near the lower limit.
- No planets must be placed within the systems Forbidden Zone
- Eccentricity should be from 0.4 to 0.7.
- Habitable planet should be outside the forbidden zone, within the habitable zone and at least 4× the max separation.
- Will host a single planetary system.
- Type S binary star system
- Separation should be 120 to 600 AU apart and is ideally in the upper limit.
- Outer limit of the hill sphere should not be within the minimum limit of the Forbidden Zone.
- Eccentricity should be from 0.4 to 0.7.
- Will host two separate planetary systems.
[edit] Planetary System
- The following criteria must be met for a planet to be habitable.
- Mass should be 0.1 to 3.5 Earth Masses.
- Radius should be between 0.5 to 1.5 Earth Radius.
- Gravity should not be less than 0.4 Earth Gravity and not more than 1.6 Earth Gravity.
- Eccentricity should be more than 0 but less than 0.2.
[edit] Planetary Equations
Please note that the values are relative to Earth's unless otherwise specified.
- Planet Maker:
g = M/R^2 = Rρ
where:M is the planet's mass, R is the planet's radius, g is the planet's gravity, ρ is the planet's gravity
- Orbital Period:
P = sqrt(a^3/M)
where:M is the planets mass and a is the semi major axis
- Density:
ρ = M/R^3
where:M is the planets mass and R is the semi major axis
- Escape Velocity:
v = sqrt(M/R)
where:M is the planets mass and R is the semi major axis
[edit] Stellar Equations
Please note that the values are relative to Sun's unless otherwise specified.
- Radius
if M > 1 then R = M^0.8 else R = M^0.5
D = M^0.74
- Luminosity
L = M^3.5
- Lifetime
Age = M/L * 10e9 or Age = M^-2.5 * 10e9
- Temperature
Teff = (L/R^2)^1/4 or Teff = M^0.505
- Gravity
g = M/R^2
- Escape Velocity
V1 = sqrt(M/R)
- Habitable zone
HZ = sqrt(L/1.1) to HZ = sqrt(L/0.53)
- Frost Line
HZ = 4.85 * sqrt(L)
- Limit
I = 0.1*M to O = 40*M
- Primary to baricenter
Pp = a * (M2/(M1+M2))
- Periapsis
Pp = a * (1 - e)
- Apoapsis
Ap = a * (1 + e)
- Min Separation
Min = Pp1 + Pp2
- Max Separation
Max = Ap1 + Ap2
- Forbidden Zone
Inner = (Min separation)/3
Outer = (Max separation) * 3
[edit] Density
For terrestrial bodies: density greater than 5 indicates an object is mainly made up of rocks and metals. Density between 2 to 5 indicates mainly made up of rocks and ice while between 1 to 2 is mainly composed of ice.
For giant planets: densities greater than 1.5 indicates mainly made up of volatile ices while lower densities suggest a mainly gaseous composition.
A major moon is any satellite which has a radius greater than 0.2 to 0.3 Earth radius.
[edit] Star Mass
- Stars with masses between 0.5 to 1.6 Solar Mass has the highest probability of hosting humanoid life.
- Stars with masses between 0.3 to 0.5 Solar Mass is capable of hosting humanoid life if they are more than 2GA and their planets has magnetic fields which helped retain its atmosphere.
[edit] Planet Ranges
- Dwarf planet: Mass range 0.0001 - 0.1Me, radius range >0.03Re
- Terrestrial planet: Mass range 0.1 - 10Me, radius range <1.25Re
- Super earth: Radius range 1.5 - 2Re
- Neptune size: Radius range 2 - 6Re
- Subgiant planet: Radius range 6 - 15Re
- Giant planet: Mass range 10Me - 13Mj, radius range >15Re
- Brown dwarf: Mass range 13Mj - 75Mj
- Star: Mass range 80+Mj
[edit] Stellar Groups
System is a collection of stars in close proximity with each other. Typically stars in a system are never more than 6,000AU or 0.1LY apart. Stars in a system are gravitationally bound to each other.
Group is a small collection of stars occupying a small portion of a galaxy. They are generally not gravitationally bound and are normally more than 10,000AU apart. Individual stars, binary and multiple star systems generally groups together to form a group.
Sector is a large collection of stars which occupies the same region of a galaxy. Individual stars, systems and groups maybe grouped together in order to form a sector.
Quadrant is a collection of stars that resides in one of the four quadrants of a galaxy. They are named I through IV and are numbered in a clockwise manner starting from the lower left if view topside.
