Planetary Nebulae
Low mass stars up to 10 solar mass (depending on
their metallicity) end their lives as planetary nebulae. These are the result of
the stellar mass expansion when definitely ended atomic fusion in the core of
the dying star. The resulting matter will dissolve in the interstellar medium,
enriching it with the elements synthesized by the star plus its envelope of
Hydrogen and Helium. In the middle a cooling white dwarf is the remnant core of
the ended star.
LRGB : Luminance, Red,
Green, Blue
SHO : SulphurII,
Hydrogen-alpha, Oxygen III
HOS : Hydrogen-alpha,
Oxygen III, Sulphur II
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