Space elevator
Alien contact
Colonizing space
Planetary/terra formation (creating planets)
Orbital stations
Solar sails
Mining of the moon/planets/asteroids
Starships
Life on Mars
Control the rotation of the planets
Travel to other galaxies
Black hole generator
Space tourism
Alien invasion
Interplanetary trade
Duplicate planet Earth
Creating man-made suns
Rail-gun space stations used to shoot projectiles, drones, etc. into deep space
Shipless Space Travel
human alienism, or advanced humans visiting a primitive alien planet
Galactic alliances
Using genetic manipulation to create aliens to live on alien planets
Universe creation/destruction
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