You need a level 20 embassy to build a Space Station hull.

You need to be a member of an alliance to send a Space Station hull.

Sending out a Space Station hull is an act of colonization, so if you are an Isolationist, you will lose your Isolationist status when you do.

Sending a Space Station Hull costs happiness the same as a Colony Ship does.  See Happiness or Colony Ship pages for more details.

Space Station hulls have a maximum speed of 54 with an average of about 30.  So the travel time to a nearby orbit is about 8-12 hours on average.  The survival time of an SS after arrival is about is about 9 hours. After that point the station will take damage and if enough damage is taken the station will die and become an Asteroid.