Prior to this feedback I am going to leave, I have provided one time-consuming constructive criticism, one positive feedback and in this one I shall leave both a constructive and an uninspiring comment in the style of a comment you have recently left for me - I hope you notice the difference between what is a helpful and what isn't.
the concept is interesting - while there are certainly elements that are commonly used, the angle and composition is unique in my opinion - it's bright in some parts and certainly catches the viewers attention while keeping it focused - these points are positive - my suggestions on how to improve this piece are as follows: the lighting on this I don't feel is spot on - the light on the asteroids doesn't reflect the glow that would be given off by the blue/green hue of the nebula since I am assuming this is what is being used as a focal point for the lighting on the objects within this - if you drew a line down the centre of this piece and follow it down to the bottom you will see this asteroid of medium/large size in comparison with the rest of the asteroids in this - this lighting is flat at 0 degrees - this needs to be rotated to the right a bit to follow the centre of the nebula and the lighting direction of it
the black bars at the top and bottom of this kind of ruin the feeling of the piece a tiny bit and the glow on it doesn't help either - I'd increase the opacity of these bars to 100% and remove the glow
overall for a piece that was done just for fun, it has a lot of potential once a few alterations are made.
NOT SO HELPFUL FEEDBACK:
the lighting in this is wrong, the colours wrong - better than most space images but not the best.