Starting a space themed quilt

My DIL asked me to make quilts for the boys.  She is planning a space theme for their room so I am going to make quilts with space stuff...
I am developing a pattern that I hope she will like.  I am going to use "made" fabric for most of the quilt top.

here is the first block......... can you guess what it is?

Lots more to come later!   I will  post as I design and make more  of the blocks..