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Lemon Slice Nebula : ウィキペディア英語版 | Lemon Slice Nebula
The Lemon slice nebula, also known as IC 3568, is a planetary nebula that is 1.3 kiloparsecs (4500 ly) away from Earth in the constellation of Camelopardalis (just 7.5 degrees from Polaris). It is a relatively young nebula and has a core diameter of only about 0.4 light years.〔(IC 3568 )〕〔(Portal to the Universe.org )〕 The Lemon slice nebula is one of the most simple nebulae known, with an almost perfectly spherical morphology. It appears very similar to a lemon, for which it is named. The core of the nebula does not have a distinctly visible structure in formation and is mostly composed of ionized helium.〔(starrycritters.com )〕 The central star is a very hot and bright asymptotic red giant, and can be seen as a red-orange hue in an amateur's telescope.〔( Wiliams.edu )〕 A faint halo of interstellar dust surrounds the nebula. == See also ==
*Planetary Nebula
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