502
science-based
× 49 |
92
space-travel
× 7 |
60
orbital-mechanics
× 9 |
33
futurology
× 2 |
239
gravity
× 10 |
88
atmosphere
× 6 |
50
flora
× 3 |
31
moons
× 7 |
199
reality-check
× 20 |
85
energy
× 3 |
47
space
× 9 |
30
magic
× 3 |
174
planets
× 17 |
85
temperature
× 3 |
47
solar-system
× 5 |
30
climate
× 2 |
162
physics
× 16 |
79
humans
× 5 |
46
astronomy
× 7 |
29
transportation
× 2 |
149
environment
× 10 |
75
weapons
× 3 |
41
creature-design
× 2 |
28
warfare
× 4 |
143
time-travel
× 8 |
71
survival
× 3 |
39
tidally-locked
|
27
population
|
131
science-fiction
× 12 |
69
combat
|
38
geography
× 6 |
27
health
|
103
time-manipulation
|
67
economy
× 5 |
37
hard-science
× 9 |
26
infrastructure
× 2 |
103
spacetime-dimensions
|
66
space-combat
× 2 |
36
flight
|
26
polar-region
|
95
biology
× 10 |
62
asteroids
× 2 |
34
geology
× 4 |
25
terraforming
× 4 |
95
near-future
× 3 |
61
evolution
× 5 |
34
gas
× 3 |
22
faster-than-light
× 5 |
93
earth
× 3 |
61
weapon-mass-destruction
× 4 |
33
spaceships
× 5 |
22
ancient-history
× 2 |