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The Boomerang Nebula is a protoplanetary nebula in Centaurus, named in 1979 and notable as the coldest known natural object in space.
The Red Rectangle Nebula is HD 44179, a protoplanetary nebula in Monoceros discovered in 1973 and notable for its red X-shaped structure.
The Homunculus Nebula is a bipolar cloud around Eta Carinae, ejected during the star's Great Eruption observed in the 1840s.
The Egg Nebula is CRL 2688, a bipolar protoplanetary nebula in Cygnus whose peculiar properties were first described from 1970s AFGL data.
The Hourglass Nebula is MyCn 18 in Musca, a planetary nebula notable for its symmetric hourglass shape in a 1996 Hubble image.
In her 1995 memoir, psychologist Kay Redfield Jamison recounts her personal struggle with bipolar disorder, blending clinical expertise with life experience.
The Ant Nebula is Menzel 3, a bipolar planetary nebula in Norma named for its ant-like lobes and cataloged by Donald Menzel in 1922.
The Red Spider Nebula is NGC 6537 in Sagittarius, a bipolar planetary nebula notable for one of the hottest known white-dwarf central stars.
The Retina Nebula is IC 4406 in Lupus, a planetary nebula notable for its edge-on dusty torus, which gives it a striped retinal appearance.
The Calabash Nebula is OH 231.8+4.2, a protoplanetary nebula in Puppis notable for sulfur-rich gas and fast bipolar outflows.
The Frosty Leo Nebula is IRAS 09371+1212, a protoplanetary nebula in Leo notable for crystalline ice dominating its far-infrared spectrum.
The Footprint Nebula is M1-92, a bipolar protoplanetary reflection nebula in Cygnus discovered by Rudolph Minkowski in 1946.
The Cotton Candy Nebula is IRAS 17150-3224, a bipolar protoplanetary nebula in Scorpius noted for concentric shells seen by Hubble.
