Low-mass stars like our Sun expel their outer layers as a planetary nebula because of what is going on in the star’s core as it ages.

The Owl Nebula is an example of a planetary nebula — a type of object that yields glimpses of stellar death in slow motion.

Planetary nebula: The Helix Nebula This is composed of expanding gas that was blown off by a star as it collapsed to a white dwarf. (Image credit: NASA, ESA, J. Hester, A. Loll (ASU)) ...

A planetary nebula is an astronomical object consisting of a glowing shell of gas and plasma formed by certain types of stars at the end of their lives. They are in fact unrelated to planets; the ...

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Gazing into a planetary nebula 2,500 light-years away in space may remind people the sun will eventually die, too. WIll it also go out with a light show?

The Cat's Eye Nebula, a planetary nebula formally known as NGC 6543. According to NASA, "Observations suggest the star ejected its mass in a series of pulses at 1,500-year intervals.

With no Moon in the sky, we're centering on M15, which stands 60° high in the southern sky around 3:30 A.M. local daylight time. (Nighttime observers can also catch this object, though it rises about ...

The galactic masterpiece combines over 100 exposures to reveal previously unseen features of stars in formation.