Lihat sumber Nebula planeter

[[Berkas:NGC6543.jpg|jmpl|Gambar sinar X Nebula mata kucing.]]
[[Berkas:The Formation of Planetary Nebulae.OGG|jmpl|Formasi Nebula planeter.]]
[[Berkas:NGC 6326 by Hubble Space Telescope.jpg|250px|jmpl|NGC 6326, sebuah nebula planeter<ref name="Miszalski2011">{{harvnb|Miszalski|Jones|Rodriguez-Gil|Boffin|2011}}</ref>]]

'''Nebula planeter''' adalah sebuah emisi [[nebula]] yang terdiri dari cangkang gas terionisasi yang bersinar yang sedang mengembang yang dikeluarkan selama fase [[cabang raksasa asimtotik|masa asimtotik]] dari beberapa jenis bintang dalam siklus akhir kehidupan bintang tersebut.<ref name="Frankowskietal2009">{{harvnb|Frankowski|Soker|2009|pp=654–8}}</ref>

Istilah Nebula planeter sebenarnya berawal dari kekeliruan yang dilakukan oleh [[William Herschel]] (1784 atau 1785) karena jika dilihat melalui teleskop, objek-objek tersebut terlihat menyerupai awan (nebula) yang mirip dengan penampakan Uranus, planet yang telah ditemukan dengan teleskop oleh Herschel. Nama yang diberikan oleh Herschel ini kemudian diadopsi oleh para astronom dan tidak pernah berubah lagi, walaupun nebula planeter sama sekali tidak ada hubungannya dengan planet di sistem [[Tata Surya|tata surya]].<ref name="hubbleSite1997">{{harvnb|Hubblesite.org|1997}}</ref>

Nebula planeter sering berisikan bintang, tetapi tidak terlihat adanya planet. Objek ini merupakan fenomena yang berumur cukup pendek, yakni beberapa puluh ribu tahun, dibandingkan dengan umur bintang yang bisa beberapa miliar tahun.

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{{Refend}}

== Pranala luar ==
* {{en}} [http://www.daviddarling.info/encyclopedia/P/planneb.html Entry in the Encyclopedia of Astrobiology, Astronomy, and Spaceflight]
* {{en}} [http://chandra.harvard.edu/photo/cycle1/1220/index.html Press release on recent observations of the Cat's Eye Nebula]
* {{en}} [http://www.seds.org/messier/planetar.html Planetary Nebulae] {{Webarchive|url=https://web.archive.org/web/20051217172822/http://www.seds.org/messier/planetar.html |date=2005-12-17 }}, SEDS Messier Pages
* {{en}} [http://www.spacedaily.com/news/stellar-chemistry-05a.html The first detection of magnetic fields in the central stars of four planetary nebulae]
* {{en}} [http://www.nightskyinfo.com/planetary_nebulae Planetary Nebulae—Information and amateur observations]
* {{en}} [http://xstructure.inr.ac.ru/x-bin/theme3.py?level=1&index1=38478 Planetary nebula on arxiv.org]

[[Kategori:Nebula planeter| ]]