Planetary Nebulae

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Planetary Nebulae represent the final stage of an average star like our sun. They consist of an expanding glowing shell of ionized gas and plasma, which is ejected by a dying star at the end of its development. The name is misleading, because such objects do not have anything common with planets. Nevertheless these nebulas are called Planetary Nebulae because they look very similar to gas planets when viewed through a telescope.
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