Gary Imm

GaryI

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Ansae, or "handles", sometimes appear on each side of the progenitor star of a PN. Scientists have found that these ansae are expanding faster than the nebula shell itself. They have been nicknamed FLIERs, or Fast Low Ionization Emission Regions. They are tiny and are much easier to see on Hubble images. These ansae are often found in PN which have fast rotating binary central star systems.