The diameter of a typical planetary nebula, after 10,000 years of expansion, is

Name: The diameter of a typical planetary nebula, after 10,000 years of expansion, is
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Planetary nebulae, after expanding for about 10,000 years, can reach sizes of a few light-years across. This expansion is the result of the outer layers of a star being expelled into space at the end of its life cycle, before these layers spread out and cool to form the nebula.

The Diameter of a Typical Planetary Nebula, After 10,000 Years