While the human body remains a mystery even to scientists who study it their entire lives, it is not the only far frontier. Astrophysicists find outer space equally difficult to explore and explain, and they too have considered practical and technical uses for origami. A team at San Bernardino Valley College in Southern California created Starshade, a large structure that looks like a sunflower and acts like a pair of sunglasses: By blocking out a star's overpowering rays of light, the device helps a telescope produce a clearer image of the planets that orbit the star. What analogy is used in this paragraph?