I dont think that would be possible becuz the planets would crash against tradelanes

sorry for my bad english.

but when the tradelanes and bases etc. spin too(also the asteroids and mines and nebulas)

And Moons must spin around their planet!

`you can give a ship the mesh of a moon, dont ask what happens when it docks at the planet but you can always try.

The term you're looking for is "revolve", not "spin", and it's a process that's just not possible in this game. The tradelane setup of transportation dictates that it's impossible, because the farther away from the centre of mass of a system an orbiting body is, the slower it travels (it's Keplar's third law of celestrial kinomatics). The tradelanes simply would not stay together.

4get the trade lanes then, make everyone travel tha slow way and or make tha ships go faster in cruise.

You missed the point.
The game is not designed to allow objects to orbit other objects.
The tradelanes are the most obvious (from this gamer's perspective) reason why this feature (i.e. the code) was not included in the game, but it's not necessarily the only.
Removing the tradelanes and upping cruise speed does not make the planets revolve. It's simply not an option open to modders -- not without the source code.

Simple, make the sun spin by itself.

if the sun spin, you won;t see the difference.

make the background spin...albeit very slowly..