凸缘

Tommy Turtle (tu) is installing a convex (凸) lens to the outer hull of the space station (Ø1). The lens is so convex that Tommy Turtle is unable to embrace it with his arms.

缘 = 彖 + 纟 : Yu the Great (yu) is foreseeing the silkworm's (纟) future in the anthill's kitchen (an2) using the Book of Changes (彖). The book says that the silk worm has great karma (缘) and will lead a long and fulfilled life.