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physical object > natural object > celestial body > nebula > H II region > gaseous nebula

gaseous nebula comparison table

Subject	has purpose	has illuminating star(s)	has absolute magnitude	has expansion velocity	has explosion date	is a kind of	has progenitor star	is an instance of	has synonym	has image	has definition	has distance	has discoverery date	has age	has discoverer	has composition	has Messier number
30 Doradus Nebula			Mv = - 19					gaseous nebula	Tarantula Nebula		A giant H II region, at least 300 pc across - one of the largest known. It is larger and more luminous than any known in the Galaxy. It is the brightest object in the Large Magellanic Cloud at both optical and radio wavelengths, and contains the densest concentration of W-R stars. (The brightest object near the center is a O+ WN star of Mv = - 10.2.) It is characterized by very rapid, disordered, and complex motions.	170000 light years				ionized hydrogen
Carina Nebula								gaseous nebula	NGC 3372							ionized hydrogen
Eagle Nebula								gaseous nebula	IC 4703			7000 light years				ionized hydrogen
expanding emission nebula						gaseous nebula			emission nebula							enhanced with heavy elements relative to the interstellar medium
Keyhole Nebula								gaseous nebula	emission nebula							ionized hydrogen
Lagoon Nebula	originally to catalog all objects which could be confused with a comet							Messier object	NGC 6523		An emission nebula in Sagittarius 2 kpc distant.	5000 light years				ionized hydrogen	8
N 159								gaseous nebula	emission nebula			170000 light years				ionized hydrogen
NGC 3603								gaseous nebula	emission nebula							ionized hydrogen
NGC 604								gaseous nebula	emission nebula							ionized hydrogen
North America Nebula								gaseous nebula	NGC 7000		An emission nebula in Cygnus.					ionized hydrogen
Omega Nebula	originally to catalog all objects which could be confused with a comet							Messier object	NGC 6618		A bright H II region. It is a double radio source.	from Earth	1745		Philippe Loys de Cheseaux	ionized hydrogen	17
Orion Nebula	originally to catalog all objects which could be confused with a comet	trapezium						Messier object	M 42		The Orion Nebula, a star-forming region in the constellation Orion.	500 pc		20000 years		ionized hydrogen	42
Tarantula Nebula								gaseous nebula	emission nebula							ionized hydrogen
Trifid Nebula	originally to catalog all objects which could be confused with a comet							Messier object	NGC 6514		An emission nebula in Sagittarius.	9000 light years				ionized hydrogen	20

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