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Helix Nebula
Photo: Eyeball-shaped Helix Nebula
WALLPAPER
The familiar eyeball shape of the Helix Nebula shows only two dimensions of this complex celestial body. But new observations suggest it may actually be composed of two gaseous disks nearly perpendicular to each other.
Photograph courtesy NASA/ESA/C. R. O'Dell (Vanderbilt University)

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