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- NGC_7027 abstract "NGC 7027 is a very young and dense planetary nebula located around 3,000 light-years (920 pc) away in the constellation Cygnus. It was discovered in 1878 by Édouard Stephan, using the 31 inch reflector at Marseille Observatory. It is one of the smallest planetary nebulae, and by far the most extensively studied.NGC 7027 is one of the visually brightest planetary nebulae. It is about 600 years old.It is unusually small, measuring only 0.2 by 0.1 light-years whereas the typical size for a planetary nebula is 1 light-year. It has a very complex shape, consisting of an elliptical region of ionized gas within a massive neutral cloud. The inner structure is surrounded by a translucent shroud of gas and dust.The nebula is shaped like a prolate ellipsoidal shell and contains a photodissociation region shaped like a \"clover leaf\". NGC 7027 is expanding at 17 kilometers per second (11 mi/s). The central regions of NGC 7027 have been found to emit X-rays, indicating very high temperatures. Surrounding the ellipsoidal nebula are a series of faint, blue concentric shells.It is possible that the central white dwarf of NGC 7027 has an accretion disk that acts as a source of high temperatures. The white dwarf is believed to have a mass approximately 0.7 times the mass of the Sun and is radiating at 7,700 times the Sun's luminosity. NGC 7027 is currently in a short phase of planetary nebula evolution in which molecules in its envelope are being dissociated into their component atoms, and the atoms are being ionized.The expanding halo of NGC 7027 has a mass of about three times the mass of the Sun, and is about 100 times more massive than the ionized central region. This mass loss in NGC 7027 provided important evidence that stars a few times more massive than the Sun can avoid being destroyed in supernova explosions.NGC 7027 has a rich and highly ionized spectrum caused by its hot central star. The nebula is rich in carbon, and is a very interesting object for the study of carbon chemistry in dense molecular material exposed to strong ultraviolet radiation. The spectrum of NGC 7027 contains fewer spectral lines from neutral molecules than is usual for planetary nebulae. This is due to the destruction of neutral molecules by intense UV radiation. The nebula contains ions of extremely high ionization potential. NGC 7027 is a promising place to look for HeH+, a molecule which is believed to exist in interstellar space, but which has never been conclusively identified. There is evidence for the presence of nanodiamond in NGC 7027.It was photographed by the Hubble Space Telescope in 1996. Prior to these observations, NGC 7027 was thought to be a proto-planetary nebula with the central star too cool to ionize any of the gas, but it is now known to be a planetary nebula in the earliest stage of its development. The central star is believed to have been about 3–4 times the mass of the Sun.Despite being so well known and studied, NGC 7027 does not have a popular name. In a 6\" telescope at around 50x it appears as a relatively bright bluish star. It is best viewed with the highest magnification possible.".
- NGC_7027 thumbnail Hst_NGC7027_big.gif?width=300.
- NGC_7027 wikiPageExternalLink ap980325.html.
- NGC_7027 wikiPageExternalLink ap960117.html.
- NGC_7027 wikiPageExternalLink 11.
- NGC_7027 wikiPageID "1337421".
- NGC_7027 wikiPageLength "9853".
- NGC_7027 wikiPageOutDegree "27".
- NGC_7027 wikiPageRevisionID "646650874".
- NGC_7027 wikiPageWikiLink Accretion_disk.
- NGC_7027 wikiPageWikiLink Carbon.
- NGC_7027 wikiPageWikiLink Category:NGC_objects.
- NGC_7027 wikiPageWikiLink Category:Planetary_nebulae.
- NGC_7027 wikiPageWikiLink Category:Protoplanetary_nebulae.
- NGC_7027 wikiPageWikiLink Constellation.
- NGC_7027 wikiPageWikiLink Cygnus_(constellation).
- NGC_7027 wikiPageWikiLink Epoch_(astronomy).
- NGC_7027 wikiPageWikiLink Helium_hydride_ion.
- NGC_7027 wikiPageWikiLink Hubble_Space_Telescope.
- NGC_7027 wikiPageWikiLink Ionization_energy.
- NGC_7027 wikiPageWikiLink List_of_NGC_objects.
- NGC_7027 wikiPageWikiLink Luminosity.
- NGC_7027 wikiPageWikiLink Marseille_Observatory.
- NGC_7027 wikiPageWikiLink Molecule.
- NGC_7027 wikiPageWikiLink Nanodiamond.
- NGC_7027 wikiPageWikiLink New_General_Catalogue.
- NGC_7027 wikiPageWikiLink Photodissociation.
- NGC_7027 wikiPageWikiLink Planetary_nebula.
- NGC_7027 wikiPageWikiLink Spectrum.
- NGC_7027 wikiPageWikiLink Sun.
- NGC_7027 wikiPageWikiLink Supernova.
- NGC_7027 wikiPageWikiLink Ultraviolet.
- NGC_7027 wikiPageWikiLink White_dwarf.
- NGC_7027 wikiPageWikiLink X-ray.
- NGC_7027 wikiPageWikiLink Édouard_Stephan.
- NGC_7027 wikiPageWikiLinkText "7027".
- NGC_7027 wikiPageWikiLinkText "NGC 7027".
- NGC_7027 appmagV "10".
- NGC_7027 constellation Cygnus_(constellation).
- NGC_7027 distLy "3000".
- NGC_7027 epoch Epoch_(astronomy).
- NGC_7027 name "NGC 7027".
- NGC_7027 radiusLy "14000.0".
- NGC_7027 sizeV "14"".
- NGC_7027 type "planetary".
- NGC_7027 wikiPageUsesTemplate Template:Catalogs.
- NGC_7027 wikiPageUsesTemplate Template:Commons_category.
- NGC_7027 wikiPageUsesTemplate Template:Convert.
- NGC_7027 wikiPageUsesTemplate Template:DEC.
- NGC_7027 wikiPageUsesTemplate Template:Infobox_nebula.
- NGC_7027 wikiPageUsesTemplate Template:RA.
- NGC_7027 wikiPageUsesTemplate Template:Reflist.
- NGC_7027 subject Category:NGC_objects.
- NGC_7027 subject Category:Planetary_nebulae.
- NGC_7027 subject Category:Protoplanetary_nebulae.
- NGC_7027 type Catalogue.
- NGC_7027 type Object.
- NGC_7027 comment "NGC 7027 is a very young and dense planetary nebula located around 3,000 light-years (920 pc) away in the constellation Cygnus. It was discovered in 1878 by Édouard Stephan, using the 31 inch reflector at Marseille Observatory. It is one of the smallest planetary nebulae, and by far the most extensively studied.NGC 7027 is one of the visually brightest planetary nebulae.".
- NGC_7027 label "NGC 7027".
- NGC_7027 sameAs Q1126321.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs m.04tv2b.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 sameAs Q1126321.
- NGC_7027 sameAs NGC_7027.
- NGC_7027 wasDerivedFrom NGC_7027?oldid=646650874.
- NGC_7027 depiction Hst_NGC7027_big.gif.
- NGC_7027 isPrimaryTopicOf NGC_7027.