The nose of the ship looks a little unfinished, a litte square to me. The back part of the ship, the ring, looks a little to large for the rest of the ship, either make it smaller or make it thinner I would say.
The lens flare is good, but it doesn’t seam to match the lighting on the ship itself. Judging from the to bumps on the front of the ship, it appears the the light source is coming from above and to the back of the ship, plus there are no shadows from the lens flare which appears t obe coming from behind the ship and to the side.
Also, where are the stars? Or are you compensating for the camera irus
…mmm, just looking at it now it looks like the light source is coming from the top, aka from the lens flare, I had the impression it was like a bright sun or something.
Ypu could work some more on the booster on the side of the ship, it looks a little too much like a grey cone to me, maybe add some curve to it…
Keep improving it and it will look great.