Nice work! There is one thing that made me wonder about the vessel in the center though, it looks as if it needs the top of the lip to come around in front so that it doesn't look like something flat pasted on. Just a thought, still a nice piece of work!
It is known that there is an infinite number of worlds, simply because there is an infinite amount of space for them to be in. However, not every one of them is inhabited. Therefore, there must be a finite number of inhabited worlds. Any finite number divided by infinity is as near to nothing as makes no odds, so the average population of all the planets in the universe can be said to be zero. From this it follows that the population of the universe is also zero, and that any people you may meet from time to time are merely the product of a deranged imagination.