Term: planetary nebula: a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: moon shell: marine gastropods having smooth rounded shells that form short spires
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: pilot: a person qualified to guide ships through difficult waters going into or out of a harbor
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: balance of trade: the difference in value over a period of time of a country's imports and exports of merchandise
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: yellow-blue dichromacy: confusion of yellow and blue
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: eysenck personality inventory: a self-report personality inventory based on Hans Eysenck's factor analysis of personality which assumes three basic factors (the two most important being extraversion to introversion and neuroticism)
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: kaopectate: trade name for a fixed-combination antidiarrheal drug that use kaolin as the adsorbent and pectin as the emollient
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: fijian: a native or inhabitant of Fiji
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: wallet: a pocket-size case for holding papers and paper money
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: locker: a fastener that locks or closes
Broader: nebula: an immense cloud of gas (mainly hydrogen) and dust in interstellar space | Unrelated: eye operation: any surgical procedure involving the eyes