The Butterfly Nebula from Hubble

Credit & Copyright: NASAESA, and the Hubble SM4 ERO Team

 Few butterflies have a wingspan this big. The bright clusters and nebulae of planet Earth’s night sky are often named for flowers orinsects, and NGC 6302 is no exception. With an estimated surface temperature of about 250,000 degrees C, the central star of this particularplanetary nebula is exceptionally hot though — shining brightly in ultraviolet light but hidden from direct view by a dense torus of dust. Thisdramatically detailed close-up of the dying star’s nebula was recorded by the Hubble Space Telescope soon after it was upgraded in 2009. Cutting across a bright cavity of ionized gas, the dust torus surrounding the central star is near the center of this view, almost edge-on to the line-of-sight. Molecular hydrogen has been detected in the hot star’s dusty cosmic shroud. NGC 6302 lies about 4,000 light-years away in the arachnologicallycorrect constellation of the Scorpion (Scorpius).
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