Why do space ports need cargo bays?

[Tampa_Gamer]

I noticed the spaceports have cargo bays yet they can also access unlimited planetary cargo. Are the cargo bays there for reality sake or do they actually serve an in- game purpose?

[necaradan666]

I think you can also build spaceports in space, the default design will need cargo bays in that case

[Tampa_Gamer]

Good point, I don't see too many but I can see how the AI would not be able to distinguish between planetary vs space designs.

[Raap]

And realistically, you shouldn't be able to use gas giants as storage planets. But here you can.

[Neman]

What are the requirements for building a spaceport anywhere except at a colony? Is it something you research?

[Bloodly]

No requirements, but you'll have to obey space limits for those ones.

[Neman]

I don't see the option n the constructors or gas giant to create a spaceport... What am I missing?