La Superba
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La Superba is a strikingly red giant star in the constellation Canes Venatici. It is faintly visible to the naked eye, and the red colour is very obvious in binoculars. It is a carbon star and semireg
Y Canum Venaticorum in optical light
Y CVn and the Sun at the same distance; rendered with Celestia
Planetary nebula
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A planetary nebula is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives.
Some famous planetary nebulae
X-ray/optical composite image of the Cat's Eye Nebula (NGC 6543)
Two cameras aboard Webb Telescope captured the latest image of this planetary nebula, cataloged as NGC 3132, and known informally as the Southern Ring Nebula. It is approximately 2,500 light-years away.
NGC 6326, a planetary nebula with glowing wisps of outpouring gas that are lit up by a binary central star