First of all, I have to say that the color scheme is perfect! This was what most drew my attention at first. You chose the colors very well even for her skin, hair and clothe, which reflects the environment colors. This is very important to make all the elements in the piece look natural.
The bright on her skin is really nice, and I love how her beautiful hair is being blown by the wind. I also like how you made the sky look like the space with these stars, it gives a fantasy mood to the piece.
I'm not sure but It seems that the size of the elements in the background - mainly the ship - is not correct, I guess in this distance the elements would be bigger. It feels like she's too big for the environment.
But this is very beautiful, congrats.