The trick is knowing its 3D, not 2D :)
They orbit behind it and in front of it, but it is too bright to see this and I hadn't manged to successfully create a screen space shader that darkened it when in front and made it outline when going behind, which I think would of made that clearer to people . Thanks so much for the constructive feedback :)
p.s. Subtly, the orbiting asteroids, do shade the colour of green when inside the green band and fade to red as your time on in the danger zone runs out. which is 5 seconds i think, another UI thing I coulda done to add to UX but I ended up focussing the last night on making music for the game ha .
Thanks again:)