page_title: Bipolar nebula
section_title: Examples
hierarchical_section_title: Bipolar nebula / Examples
caption_attribution_description: Planetary nebula M2-9.
context_page_description: A bipolar nebula is a type of nebula characterized by two lobes either side of a central star. About 10-20% of planetary nebulae are bipolar.
context_section_description: Homunculus Nebula around Eta Carinae
  Hubble 5
  M2-9 – The Wings of a Butterfly Nebula
  OH231.8+4.2 – The Calabash Nebula or Rotten Egg Nebula
  Mz3 (or Menzel 3) – The Ant Nebula
  CRL 2688 – The Egg Nebula
  HD 44179 – The Red Rectangle Nebula
  MyCn18 – The Engraved Hourglass Nebula
  He2-104 – The Southern Crab Nebula
  The Boomerang Nebula
  NGC 2346 – Also known as the Butterfly Nebula
caption: Planetary Nebula M2-9, otherwise known as the Twin Jet Nebula or the Wings of a Butterfly Nebula, is a bipolar nebula.
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