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A bright, compact planetary nebula in Andromeda discovered by William Herschel in 1784, notable for its nearly circular disk and vivid blue-green color visible through modest amateur telescopes.
A planetary nebula in Taurus discovered by William Herschel in 1790, historically significant as one of the first nebulae confirmed to physically surround a star.
A bipolar planetary nebula in Gemini discovered by William Herschel in 1785, with two lobes sometimes catalogued separately as NGC 2371 and NGC 2372.
A planetary nebula in Cepheus discovered by William Herschel in 1788, notable for its bilobed shape and a central white dwarf with a surface temperature of approximately 50,000 K.
A compact planetary nebula in Hercules notable for its bright central star and small angular size that produces a distinctive white-eyed appearance in images.
A planetary nebula in Delphinus roughly 7,500 light-years away, with a near-circular ionized shell and a hot central white dwarf responsible for its characteristic blue-tinted glow.
A compact planetary nebula in Hercules nicknamed the White-Eyed Pea, featuring a small bright blue-white disk and one of the hotter known central stars among nearby planetary nebulae.
A bipolar planetary nebula in Cygnus roughly 6,000 light-years away, with two lobes flanking a dense equatorial waist that produces the distinctly layered, stacked appearance behind its nickname.
A planetary nebula in Cygnus about 2,800 light-years away, notable for its irregular asymmetric shape whose outline in astronomical images is widely said to resemble a developing fetus.
A massive star-forming complex in the Perseus spiral arm of the Milky Way, one of the most productive and thoroughly studied regions of high-mass star formation in the outer Galaxy.
A compact, nearly spherical planetary nebula in Camelopardalis about 4,500 light-years away, notable for its simple symmetric concentric shell structure and conspicuous bright central star.
A compact planetary nebula in Cygnus so small angularly that it resembles a stellar point source in modest telescopes, requiring spectroscopy to confirm its nature.
Bipolar planetary nebula catalogued by astronomer Rudolph Minkowski, displaying a classic hourglass-shaped morphology produced by asymmetric stellar winds from its evolved central star.
The first entry in Sidney van den Bergh's 1966 Catalog of Reflection Nebulae, a blue reflection nebula in Cassiopeia illuminated by the hot star BD+57°174.
A faint, low-surface-brightness planetary nebula in Cassiopeia with a roughly circular morphology, located several thousand light-years from the solar system and requiring deep exposures to image.
A planetary nebula in Cepheus notable for its nearly circular multi-shell structure and bright inner disk, situated roughly 3,300 light-years from Earth.
A planetary nebula in Cassiopeia with an annular morphology catalogued in the Index Catalogue, lying several thousand light-years distant and exhibiting a moderately hot central star.
A faint, low-surface-brightness planetary nebula in Cepheus with a roughly circular shape, lying approximately 3,300 light-years from the Sun.
A small, high-surface-brightness planetary nebula in Sagitta with a compact disk morphology, lying approximately 6,000 light-years from Earth and visible in modest telescopes.
A nearly circular, high-surface-brightness planetary nebula in Perseus, making it a useful spectroscopic calibration target despite its modest apparent size.
A multi-shell planetary nebula catalogued by Czech astronomer Luboš Kohoutek, whose concentric shells record successive mass-loss episodes from its progenitor star.
