Hüperonüümid:
udu 1(n)
planetaarne udu 1(n), planetaarsed udud 1(n), planetaarudu 1(n), rõngasudu 1(n)

kerakujuline seest õõnes udukogu, meenutab teleskoobis planeedi ketast

PWN-3.0 relation(s)

eq_synonym
planetary nebula 1(n) 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

CILI relation(s)

eq_synonym
planetary_nebula 1(n) 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