I've got a spacecraft that has scrollX,Y and now the “planets” are set to always goto scrollX….. all that works but if the spacecraft's direction is say 50 and keyUp is down, how do i make the “planets” go to the spacecraft's opposit direction?

Your explanation is very unclear. Either explain your problem carefully and thoroughly or show us the project.

If you have problems with motion towards a direction set on an X - Y map, check out my project - Space Dodge - it contains a movement mechanism that might help you.

sprites planning on adding more planets later.

so if im pressing down up arrorw, I want the planets to move the other way.. that's simple, but lets say that the space ship's direction is 40 and im pressing up arrow, i want the planets to move the opposite direction of 40.. the opposite dir of the ship

ScrollX and scrollY work in the same way. They effectively are used to indicate which bit of the ‘real world’ your window is currently showing. If you're saying the planets always go to scrollX it presumably means when you ‘move right’ the planets are actually moving left in the background which means scrollX is decreasing. So for vertical movement when you ‘move up’ the sprite stays in the middle and reduces scrollY so the planets constantly goto scrollY as well.

If that doesn't help you need to share the project.