Worlds
Planets orbit the suns in a solar systems.
Moons
or
rocky
rings orbit many planets.
Planets and moons provide vast
amounts of
terrain on which players build
cities, explore, hunt, and otherwise use for whatever purpose necessary
to play the game.
Some very large planets are made up mostly of liquids
and
compressed gases. These are called gas giants. No spacecraft can
survive deep penetration into the dense high-pressure atmosphere of a
gas giant. Even if there was a solid core, you could not survive to
witness it. Gas giants may have planets orbiting them.
Ringworlds
are known to exist, relics of an ancient pan-galactic civilization.
Ringworlds
are
constructed
as
a circular trough in the habitable zone of a star, with
the open top of the trough facing inward, toward the star. The orbital
rotation and walls of the ringworld are sufficient to maintain a
breathable atmosphere inside the trough.
An inner band of shadow panels orbits the star at a pace designed to
create alternating day and night cycles on the ringworld.
Citizens experience dissatisfaction due to population pressure when the
world population limit is
exceeded. The citizens of a world become increasingly unhappy the more
the population exceeds the world population limit. World overpopulation affects morale
of citizens, shown on the status report of cities; there is no limit to
this negative morale modifier. World population limit only
applies to planets and moons as gas giants cannot be populated.
Planets and Moons
Diameter
|
Gravity
at
Sea Level
|
World
Population
Limit
|
1,800m
|
1.5152m/sec²
|
100
|
3,800m
|
3.03039m/sec²
|
200
|
5,600m
|
4.54559m/sec²
|
300
|
7,600m
|
6.06078m/sec²
|
400
|
9,400m
|
7.57598m/sec²
|
500
|
11,400m
|
9.09118m/sec²
|
600
|
| Ringworld |
9.09118m/sec² |
1000
per
zone, 7 zones
|
Earth
12,756km
|
9.80665m/sec² |
6,500,000,000?
|
13,200m
|
10.6064m/sec²
|
700
|
15,200m
|
12.1216m/sec²
|
800
|
17,000m
|
13.6368m/sec²
|
900
|
19,000m
|
15.152m/sec²
|
1000
|
20,800m
|
16.6672m/sec²
|
1100
|
22,800m
|
18.1824m/sec²
|
1200
|
Gas Giants
Diameter
|
Gravity
at
Sea Level
|
37,800m
|
30.3039m/sec²
|
39,800m
|
31.8191m/sec²
|
41,600m
|
33.3343m/sec²
|
43,600m
|
34.8495m/sec²
|
45,400m
|
36.3647m/sec²
|
47,400m
|
37.8799m/sec²
|
49,200m
|
39.3951m/sec²
|
51,200m
|
40.9103m/sec²
|
53,000m
|
42.4255m/sec²
|
55,000m
|
43.9407m/sec²
|
56,800m
|
45.4559m/sec²
|
58,800m
|
46.9711m/sec²
|
60,600m
|
48.4863m/sec²
|
62,400m
|
50.0015m/sec²
|
64,400m
|
51.5167m/sec²
|
66,200m
|
53.0319m/sec²
|
68,200m
|
54.5471m/sec²
|
70,000m
|
56.0623m/sec²
|
72,000m
|
57.5775m/sec²
|
73,800m
|
59.0926m/sec²
|
75,800m
|
60.6078m/sec²
|
Moons
or
rocky
rings orbit many planets. 
