Nebula Heliks: Perbedaan antara revisi
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{{Planetary nebula
'''Nebula Heliks''', dikenal juga sebagai '''The Helix''', '''NGC 7293''', adalah sebuah [[nebula planeter]] besar yang terletak di [[Rasi bintang|konstelasi]] [[Akuarius|Aquarius]]. Ditemukan oleh [[Karl Ludwig Harding]], kemungkinan sebelum tahun 1824, obyek ini merupakan salah satu yang paling dekat dengan [[Bumi]] dari semua [[nebula planeter]] lainnya.<ref name="Horaetal2006"><cite class="citation journal" contenteditable="false">Hora, Joseph L.; Latter, William B.; Smith, Howard A.; Marengo, Massimo (2006). </cite></ref> Jarak diperkirakan sekitar 215 parsec (700 [[tahun cahaya]]). Nebula ini mirip dalam penampilan dengan [[Nebula Mata Kucing]] dan [[Nebula Cincin]], yang ukuran, usia, dan karakteristik fisiknya mirip dengan [[Nebula Dumbbell]], bervariasi hanya dalam jarak relatif dan penampilan dari sudut pandang khatulistiwa.<ref name="ODelletal2002"><cite class="citation journal" contenteditable="false">O'Dell, C. R.; Balick, B.; Hajian, A. R.; Henney, W. J.; et al. (2002). </cite></ref> Nebula Heliks terkadang merujuk kepada "Mata Tuhan" dalam budaya populer,<ref><cite class="citation web" contenteditable="false">[http://www.snopes.com/photos/space/eyeofgod.asp "Urban Legends Reference Pages"]. </cite></ref> begitu juga "[[Sauron|Mata Sauron]]".<ref><cite class="citation journal">[http://www.skyandtelescope.com/online-gallery/the-eye-of-sauron-aka-ngc7293/ "The Eye of Sauron (aka NGC7293)"]. </cite></ref><ref><cite class="citation news">Nancy Atkinson (4 October 2012). </cite></ref>▼
| name = Helix Nebula
| image = [[Image:Comets Kick up Dust in Helix Nebula (PIA09178).jpg|250px]]
| caption= Helix Nebula diambil dari [[Teleskop luar angkasa Spitzer]] ([[Inframerah]], 2007<ref name="Suetal2007">{{cite journal | bibcode = 2007ApJ...657L..41S | title = A Debris Disk around the Central Star of the Helix Nebula? | date = March 2007 | journal = The Astrophysical Journal | volume = 657 | issue = 2 | pages = L41-L45 | doi = 10.1086/513018 | author = Su, K. Y. L. | display-authors = 4 | author2 = Chu, Y.-H. | author3 = Rieke, G. H. | author4 = Huggins, P. J. | author5 = Gruendl, R. | author6 = Napiwotzki, R. | author7 = Rauch, T. | author8 = Latter, W. B. | author9 = Volk, K. |arxiv = astro-ph/0702296 }}</ref>)
| credit = [[NASA]], [[JPL]], [[Caltech]], Kate Su (Steward Obs., U. Arizona).
| epoch = [[J2000]]
| ra = {{RA|22|29|38.55}}<ref name="simbad">{{cite web
| title=SIMBAD Astronomical Database
| work=Results for Helix Nebula
| url=http://simbad.u-strasbg.fr/Simbad
| accessdate=2006-12-07}}</ref>
| dec = {{DEC|-20|50|13.6}}<ref name="simbad" />
| dist_ly = {{val|714|+88|-68}} [[light-year|ly]] ({{val|219|+27|-21|ul=pc}})<ref name="Harrisetal2007">{{Cite journal
| bibcode = 2007AJ....133..631H
| title = Trigonometric Parallaxes of Central Stars of Planetary Nebulae
| date = February 2007
| journal = The Astronomical Journal
| volume = 133
| issue = 2
| pages = 631–638
| doi = 10.1086/510348
| author = Harris, Hugh C.
| display-authors = 4
| author2 = Dahn, Conard C.
| author3 = Canzian, Blaise
| author4 = Guetter, Harry H.
| author5 = Leggett, S. K.
| author6 = Levine, Stephen E.
| author7 = Luginbuhl, Christian B.
| author8 = Monet, Alice K. B.
| author9 = Monet, David G.
| author10 = Pier, Jeffrey R.
| author11 = Stone, Ronald C.
| author12 = Tilleman, Trudy
| author13 = Vrba, Frederick J.
| author14 = Walker, Richard L.
|arxiv = astro-ph/0611543 }}</ref>
| appmag_v = +7.6<ref name="simbad" />
| size_v = 25′<ref name="ODelletal2004">{{cite journal
| author=O'Dell, C. R.
| author2=McCullough, Peter R.
| author3=Meixner, Margaret
| title=Unraveling the Helix Nebula: Its Structure and Knots
| journal=The Astronomical Journal
| date=2004
| volume=128
| issue=5
| pages=2339–2356
| bibcode=2004AJ....128.2339O
| doi=10.1086/424621
|arxiv = astro-ph/0407556 }}</ref>
| constellation = [[Akuarius]]
| radius_ly = 2,87 tahun cahaya (0,88 parsec)<ref name="ODelletal2004" />
| absmag_v =
| notes = Salah satu nebula planeter terdekat
| names = [[New General Catalogue|NGC]] 7293<ref name="simbad" /> [[Caldwell catalogue|Caldwell]] 63
}}
▲'''Nebula Heliks''', dikenal juga sebagai '''The Helix''', '''NGC 7293''', adalah sebuah [[nebula planeter]] besar yang terletak di [[Rasi bintang|konstelasi]] [[Akuarius
== Referensi ==
Baris 6 ⟶ 63:
== Pranala luar ==
{{commons|Helix Nebula}}
* [http://apod.nasa.gov/apod/ap091231.html NASA APOD – December 31, 2009 - The Helix Nebula (NGC 7293)]
* [http://antwrp.gsfc.nasa.gov/apod/ap030510.html NASA APOD – May 10, 2003 - The Helix Nebula (NGC 7293)]
Baris 12 ⟶ 70:
* [http://www.nightskyinfo.com/archive/helix_planetary_nebula NightSkyInfo – The Helix Nebula (NGC 7293)]
* [http://www.snopes.com/photos/space/eyeofgod.asp Snopes - Helix Eye of God - Urban Legend]
* {{WikiSky|name=The Helix Nebula}}
{{Sky|22|29|38.55|-|20|50|13.6|695}}
* [http://www.constellation-guide.com/helix-nebula-ngc-7293-caldwell-63-in-aquarius/ Helix Nebula (NGC 7293) at Constellation Guide]
{{astronomi-stub}}
[[Kategori:Rasi bintang Aquarius]]
[[Kategori:Objek NGC]]
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