Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent nebula  ·  NGC 6888
NGC 6888 - Crescent Nebula, Greg Allegretti
NGC 6888 - Crescent Nebula
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NGC 6888 - Crescent Nebula

NGC 6888 - Crescent Nebula, Greg Allegretti
NGC 6888 - Crescent Nebula
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NGC 6888 - Crescent Nebula

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Description

This peculiar object is results from two sets of stellar wind thrown off by a central star. These shells of material were ejected at different times and have traveled outward at different rates. They are seen here to be colliding and interacting. The nebula is about 15 light years across and lies at a distance of 5,000 light years.

This image was captured under high desert skies near Santa Fe, New Mexico, USA with a telescope of 12" aperture at f/4.5 and an electrically-cooled CCD camera. This bi-colored image was taken through hydrogen-alpha (red) and oxygen-III (blue green) filters.

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NGC 6888 - Crescent Nebula, Greg Allegretti