I've made this for a Traditional Media challenge. The request was to use only two opposite colours and I chose blue (French Ultramarine) and orange (Cadmium Red& Yellow Medium).
It was surprising difficult to make a painting with only two colours, but seeing the endresult, it's possible to make a pretty nice painting out if it I'm kind of pleased with how it turned out.
There's so much energy to this piece. Most space paintings fall flat to me - cause, y'know, it's pretty hard to compete with actual space photographs - but this one adds something very dynamic.