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emission nebula
noun
Astronomy.
- a bright diffuse nebula that emits light as a result of ionization of its gas atoms by ultraviolet radiation, as the Orion Nebula, planetary nebulae, and supernova remnants, as the Crab Nebula.
emission nebula
noun
- a type of nebula that emits visible radiation See nebula
emission nebula
/ ĭ-ĭ′ə /
- A nebula that absorbs ionizing ultraviolet radiation from nearby hot stars or star remnants and reemits it as visible light. HII regions , planetary nebulae , and nebulae created by the explosion of supernovae are different kinds of emission nebulae.
- See more at nebula
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Example Sentences
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This image features the California Nebula - also known as NGC 1499 - an emission nebula in the constellation of Perseus.
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Known as the Bubble Nebula, or NGC 7635, it is an emission nebula located 8 000 light-years away; emission nebulas are interstellar clouds which are comprised of ionized gases.
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The Bubble Nebula, also known as NGC 7635, is an emission nebula located 8 000 light-years away.
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The Flame Nebula, designated as NGC 2024 and Sh2-277, is an emission nebula in the constellation Orion, lying some 900 to 1,500 light years away from Earth.
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