One to three
suns exist in each solar system.
Energy output of suns varies by spectral
type and size of the star. The amount of energy decreases with
distance from the sun. The amount of energy to strike each
world orbiting a sun determines its orbit zone.
A world's orbit zone is solely
determined by the sun that it orbits. Other suns in the same
solar system are not considered when determining orbit zone or
habitability of a world, no matter how close they pass to the
zone worlds are constantly bathed in the fiercest heat of the
Inferno zone worlds never have hospitable environments.
worlds are hot but not too hot.
Inner zone worlds sometimes have habitable environments but
they never have an indigenous population.
Inner zone worlds are not counted toward winning the game,
even if the environment is habitable.
called the Goldilocks Zone, energy output from the sun
is just right at this distance.
Habitable zone worlds usually have habitable environments,
though not always.
Habitable zone worlds with habitable environments should be
colonized to win the game.
worlds are cold but not too cold.
Outer worlds sometimes have habitable environments but they
never have an indigenous population.
Outer worlds are not counted toward winning the game, even if
the environment is habitable.
dim darkness, frigid zone worlds receive feeble energy from
Frigid zone worlds never have hospitable environments.