Nebulium

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Nebulium

a hypothetical chemical element that was assumed to exist in gaseous nebulae. The hypothesis of the existence of nebulium arose in the second half of the 19th century as an attempt to explain the many emission lines in the spectra of gaseous nebulae that could not be identified with the spectral lines of chemical substances known on the earth. However, in 1927 the American astrophysicist I. Bowen showed that these lines are actually forbidden lines of a number of known elements. It is possible for gaseous nebulae to emit the forbidden lines because of the high degree of rarefaction of the gas and because of the incident stellar radiation. The term “nebular lines” is used as a convenient designation for these lines in the spectra of nebulae.

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No references found			Nebo, Mount Nebo, Mt. Nebolchi Nebraska Nebraska & Samuel R. McKelvie National Forests Nebraska State Parks Nebraska, University of NEBRASKAland DAYS Nebraskan drift Nebraskan glaciation Nebrodi NEBS compliant Nebuchadnezzar Nebuchadrezzar II Nebula Nebular Hypothesis nebular lines nebular redshift Nebular Spectrograph nebular transitions nebular variable nebule molding nebulé molding nebulite nebulitic Nebulium nebulium line nebulizer nebulosus nebuly molding Nebushasban Nebuta Matsuri Nebuzaradan NEC NEC 780-C NEC Corp. Necatigil, Behcet Necatigil, Behçet Necedah National Wildlife Refuge necessarium necessary Necessary and Sufficient Conditions necessary bandwidth necessary condition Necessary Defense Necessary Labor Necessary Product Necessitas necessity Necessity and Chance Necessity, Fort			nebulated nebulation nebule nebule molding nebulé molding Nebulette Nebulin Nebulis Nebulis Nebulis nebulise nebulise nebulise nebulised nebulised nebulised Nebuliser Nebuliser Nebuliser nebulisers nebulisers nebulisers nebulises nebulises nebulises nebulising nebulising nebulising nebulite nebulitic Nebulium nebulium line nebulization nebulization nebulization nebulization nebulize nebulize nebulize nebulized nebulized nebulized nebulized lidocaine Nebulized Ultrasonic Distilled Water nebulizer nebulizer nebulizer nebulizers nebulizers nebulizers nebulizes nebulizes nebulizes nebulizing nebulizing nebulizing Nebulos Nebulos nebulose nebulose nebulosities

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