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Hubble image of the Hourglass Nebula in the constellation Musca
R. Sahai and J. Trauger (JPL), WFPC2 Science Team and NASA
  Image 3-20
Hourglass Nebula

The Hourglass Nebula is a young planetary nebula formed from gas that was ejected into space by a dying star. Located in the southern constellation Musca, this nebula features unique double rings of gas that give it its name. The remnants of the star in the center cause the gas to glow.

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