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13 March, 20:26

What is a planetary nebula?

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  1. 13 March, 22:08
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    First, what is a nebula?

    A nebula is a cloud of dust or different elements (remember, the Space is to a big extent empty)

    A planetary Nebula is a kind of nebula that is specifically formed with ionized gas that was released and surrounds a red giant star.
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