Planetary nebula


About Planetary nebula

Planetary nebula logo

A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from old red giant stars late in their lives.

They are a relatively short-lived phenomenon, lasting a few tens of thousands of years, compared to a typical stellar lifetime of several billion years.

Picture:

NGC 6326, a planetary nebula with glowing wisps of outpouring gas that are lit up by a binary central star.

NOTE: Above information has been taken from wikipedia and/or official websites of topics.

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