Of course it's ultimately the artist's interpretation, but it could very well be our Sol system at "another time" looking at some other planet that doesn't exist anymore. The background shows what might very well be an accretion disk and our early solar system was populated by dozens of planets that ultimately collided and coalesced into the larger planets we have today or were flung out of the solar system by gravitational encounters. A good example is the theoretical planet that collided with the early earth which resulted in the formation of the moon. So we could be looking at "another place" that no longer exists...by itself...or one that is now wandering the universe. As for the space ship, maybe they are interstellar real estate agents checking out potential listings.
Ha ha, looks like a cool time and place to live in. Nice work, love the way you painted the planets- and the space background plus the little ship accentuates the image perfectly! Thanks for sharing man!