planetary nebula

الإنجليزية - التركية

الإنجليزية - الإنجليزية

تعريف planetary nebula في الإنجليزية الإنجليزية القاموس.: A nebulosity surrounding a dying star, consisting of material expelled by the star; 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; A nebula, such as the Ring Nebula, consisting of a hot, blue-white, central star surrounded by an envelope of expanding gas. Any of a class of bright nebulae that may somewhat resemble planets when viewed through a small telescope but are, in fact, expanding shells of luminous gas around dying stars. A planetary nebula is the outer envelope shed by a red giant star not massive enough to become a supernova. Instead, the star's intensely hot core becomes exposed (see white dwarf star) and ionizes the surrounding shell of gas, which is expanding at tens of miles per second; PN
planetary nebulas: plural form of planetary nebula

planetary nebula

الواصلة

plan·e·ta·ry ne·bu·la

plänıteri nebyılı

/ˈplanəˌterē ˈnebyələ/ /ˈplænəˌtɛriː ˈnɛbjələ/

() Coined by William Herschel because of their apparent resemblance to the planet Uranus.

السابق

المفضلات