Personalized Future Astronomer Girls T-Shirt. Cute girls future occupation design with pink and brown lettering and handprint and heart logo says When I Grow Up I'm Gonna Be An Astronomer on this kids career T-Shirt - Pink. Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.