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The Cat's Eye Nebula
Picture of the Cat's Eye Nebula

NASA, ESA, HEIC, and The Hubble Heritage Team (STScI/AURA)

The geometric shapes that make up this object are shrouds of gas surrounding a dying, Sun-like star. Called the Cat's Eye Nebula, it was one of the first planetary nebulas to be discovered. A planetary nebula forms when ordinary stars gently eject their outer gaseous layers, which form amazing and puzzling shapes.