Stars in black night sky.
And another background showing the night sky, this one has a few more star clusters than the last image.
Multi colored stars.
A more realistic tile showing lots of twinkling stars in the dark night sky.
Light grey images of various planets on a white background.
Another starry night sky, this one is quite subtle so any text written over it would be very easy to read.
Blue and red stars on a white background, might work well for a 4th of July theme.
Soft white and blue star shapes on a blue background.
Pretty pastel stars on a lightly textured background.
Fluffy clouds in a dark graphite blue sky, looks like maybe a storm is brewing?