Discussing the open cluster Messier 46 and two associated objects the planetary nebula NGC 2438 and the protoplanetary nebula known as either the Calabash Nebula or Rotten Egg Nebula.
Featuring Dr Meghan Gray.
More Messier Objects: http://bit.ly/MessierObjects
Objectivity: http://bit.ly/Objectivity

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Video by Brady Haran