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- Crescent_Nebula abstract "The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away. It was discovered by Friedrich Wilhelm Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000[citation needed] years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.It is a rather faint object located about 2 degrees SW of Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8cm (with filter) can see its nebulosity. Larger telescopes (20cm or more) reveal the crescent or a Euro sign shape which makes some to call it the "Euro sign nebula".".
- Crescent_Nebula thumbnail CrescentBicolorHunterWilson.jpg?width=300.
- Crescent_Nebula wikiPageExternalLink ap071111.html.
- Crescent_Nebula wikiPageExternalLink NGC6888_Lopez.jpg.
- Crescent_Nebula wikiPageExternalLink ngc6888.
- Crescent_Nebula wikiPageExternalLink sharpless.py?s=105.
- Crescent_Nebula wikiPageExternalLink 637454349_iUj3Q.
- Crescent_Nebula wikiPageExternalLink im0834.html.
- Crescent_Nebula wikiPageID "1374631".
- Crescent_Nebula wikiPageRevisionID "591724238".
- Crescent_Nebula absmagV "-".
- Crescent_Nebula appmagV "+7.4".
- Crescent_Nebula constellation Cygnus_(constellation).
- Crescent_Nebula distLy "5000.0".
- Crescent_Nebula epoch "J2000.0".
- Crescent_Nebula hasPhotoCollection Crescent_Nebula.
- Crescent_Nebula name "Crescent Nebula".
- Crescent_Nebula names "NGC 6888, Sharpless 105, Caldwell 27".
- Crescent_Nebula notes "-".
- Crescent_Nebula radiusLy "-".
- Crescent_Nebula sizeV "18".
- Crescent_Nebula type "Emission".
- Crescent_Nebula subject Category:Caldwell_objects.
- Crescent_Nebula subject Category:Cygnus_(constellation).
- Crescent_Nebula subject Category:NGC_objects.
- Crescent_Nebula subject Category:Sharpless_objects.
- Crescent_Nebula subject Category:Wolf–Rayet_nebulae.
- Crescent_Nebula type CaldwellObjects.
- Crescent_Nebula type NGCObjects.
- Crescent_Nebula type Object100002684.
- Crescent_Nebula type PhysicalEntity100001930.
- Crescent_Nebula type SharplessObjects.
- Crescent_Nebula comment "The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away. It was discovered by Friedrich Wilhelm Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000[citation needed] years ago.".
- Crescent_Nebula label "Crescent Nebula".
- Crescent_Nebula label "NGC 6888".
- Crescent_Nebula label "NGC 6888".
- Crescent_Nebula label "NGC 6888".
- Crescent_Nebula label "NGC 6888".
- Crescent_Nebula label "NGC 6888".
- Crescent_Nebula label "NGC 6888".
- Crescent_Nebula label "NGC 6888".
- Crescent_Nebula label "Nebulosa Crescente".
- Crescent_Nebula label "Nébuleuse du Croissant".
- Crescent_Nebula label "Туманность Полумесяц".
- Crescent_Nebula sameAs NGC_6888.
- Crescent_Nebula sameAs NGC_6888.
- Crescent_Nebula sameAs Nébuleuse_du_Croissant.
- Crescent_Nebula sameAs NGC_6888.
- Crescent_Nebula sameAs NGC_6888.
- Crescent_Nebula sameAs 초승달_성운.
- Crescent_Nebula sameAs NGC_6888.
- Crescent_Nebula sameAs NGC_6888.
- Crescent_Nebula sameAs Nebulosa_Crescente.
- Crescent_Nebula sameAs m.04xp_j.
- Crescent_Nebula sameAs Q202993.
- Crescent_Nebula sameAs Q202993.
- Crescent_Nebula sameAs Crescent_Nebula.
- Crescent_Nebula wasDerivedFrom Crescent_Nebula?oldid=591724238.
- Crescent_Nebula depiction CrescentBicolorHunterWilson.jpg.
- Crescent_Nebula isPrimaryTopicOf Crescent_Nebula.