Personalized Astronomy Geek Astronomer Space Gift Long Sleeve T-Shirt. Funny astronomy geek Long Sleeve T-Shirt - Purple with telescope and stars for an astronomer, astronomy major or star gazing enthusiast. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL