Excellent as in effect always The nebulae does indeed construe a great sense of subtlety which builds up into an excellent sense of detail. They have a smooth appearance and yet in all the great ranges of tonality given to them they resound with splendid intricacy. The colours are well mixed too, which is good to see. The planets work well enough also, however it shall do good to note that the upper planet, where its horizon ends (following its umbra entering the scene from the left to where it cuts off at the right), gives a shaven off appearance. Giving that a rockier, cut look like the rest of the planet's backing would make it appear less artifical. The central planet also seems to have a few level discrepancies where the lighter parts lack some details and cut-off rather suddenly into dark tracings equally lacking some detail (relative to the rest), this can be seen just up and left a little from its centre, and also bottom right. These are however very minor issues, in fact the only I could pay attention to, as exemplary to the overall quality of this piece - nicely done!