Pinch shirt in center of fabric where you would like the center of the galaxy design to be. Twist fabric into a spiral shape.
Mix bleach and water in a spray bottle (50/50 solution) and spray desired amount over twisted shirt.
Untwist shirt and monitor periodically as the color bleaches.
Once shirt has bleached to desired liking, thoroughly rinse bleach from shirt.
Spray a rainbow of One-Step Dye colors onto shirt. Let set, then launder according to dye instructions.
Accent dry shirt with spritzes of Tulip Fabric Spray Paint in Snow.