Beacon

I like the composition, but it's far too sharp. The texture on the planet just to the right and up from the sun looks fake. The galaxy/nebula on the far right is too distracting and unnecessary. However, for realism and plausibility, few of these ever are even near realistic for aesthetic reasons or wrong information, most noticeably if the planet with the weird texture is a moon, it's far too close (which always bugs me somewhat) and there are no green-appearing stars. There's lots of stellar dust.
As for positives, aesthetically it's very nice and one of the better space arts I've seen. The composition, as I mentioned, is nice and the asteroid(?) at the bottom adds a positive touch and point of view. The small planet/moon right to the left of the sun adds depth and feels right. The effects are well done, and the creator obviously has experience.