อ้างอิง ของ เนบิวลาดัมบ์เบลล์

  1. 1 2 3 4 5 6 7 "SIMBAD Astronomical Database". Results for M 27. สืบค้นเมื่อ 2007-01-03.
  2. ↑ Harris, Hugh C.; Dahn, Conard C.; Canzian, Blaise; Guetter, Harry H.; Leggett, S. K.; Levine, Stephen E.; Luginbuhl, Christian B.; Monet, Alice K. B.; Monet, David G.; Pier, Jeffrey R.; Stone, Ronald C.; Tilleman, Trudy; Vrba, Frederick J.; Walker, Richard L. (2007). "Trigonometric Parallaxes of Central Stars of Planetary Nebulae". Astronomical Journal. 133 (2): 631–638. arXiv:astro-ph/0611543. Bibcode:2007AJ....133..631H. doi:10.1086/510348.CS1 maint: multiple names: authors list (link)
  3. ↑ O'Dell, C. R.; Balick, B.; Hajian, A. R.; Henney, W. J.; Burkert, A. (2002). "Knots in Nearby Planetary Nebulae". Astronomical Journal. 123 (6): 3329–3347. Bibcode:2002AJ....123.3329O. doi:10.1086/340726.CS1 maint: multiple names: authors list (link)

แหล่งที่มา

WikiPedia: เนบิวลาดัมบ์เบลล์ http://www.astro-pics.com/27plm.htm http://www.dsi-astronomie.de/M27AO8.html http://simbad.u-strasbg.fr/Simbad //arxiv.org/abs/astro-ph/0611543 //doi.org/10.1086%2F340726 //doi.org/10.1086%2F510348 http://www.wikisky.org/?object=%E0%B9%80%E0%B8%99%... http://www.wikisky.org/?object=%E0%B9%80%E0%B8%99%... http://www.wikisky.org/?object=%E0%B9%80%E0%B8%99%... http://www.wikisky.org/?object=%E0%B9%80%E0%B8%99%...