Ken, if you want to improve your images, you'll need attention to detail after this.
Is the image truly in focus?
Are the stars eggy or round?
Points or doughnuts?
Is the colour balance cyan (or something else) or neutral?
I won't say these are great examples of well known objects....sorry they aren't... as you've not ticked the boxes above....but you are headed in the right direction
Stick with it.