Swan Nebula

E477766

H II region astronomical object emission nebula star-forming region

The Swan Nebula, also known as M17 or the Omega Nebula, is a bright star-forming emission nebula in the constellation Sagittarius, rich in gas, dust, and young massive stars.

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All labels observed (2)

Label	Occurrences
Horseshoe Nebula	3
Swan Nebula canonical	3

Statements (49)

Predicate	Object
instanceOf	H II region ⓘ astronomical object ⓘ emission nebula ⓘ star-forming region ⓘ
alsoKnownAs	Checkmark Nebula NERFINISHED ⓘ Horseshoe Nebula NERFINISHED ⓘ Lobster Nebula NERFINISHED ⓘ M17 NERFINISHED ⓘ Messier 17 NERFINISHED ⓘ Omega Nebula NERFINISHED ⓘ
angularSize	about 11 arcminutes by 6 arcminutes ⓘ
apparentMagnitudeV	approximately 6.0 ⓘ
bestSeenIn	binoculars ⓘ small telescopes ⓘ
catalogNumber	M17 NERFINISHED ⓘ NGC 6618 NERFINISHED ⓘ Sharpless 45 NERFINISHED ⓘ
contains	interstellar dust ⓘ ionized hydrogen gas ⓘ molecular clouds ⓘ young massive stars ⓘ
declination	−16° 11′ ⓘ
discoveredBy	Philippe Loys de Chéseaux NERFINISHED ⓘ
discoveryYear	1745 ⓘ
distanceFromEarth	about 1.6 kiloparsecs ⓘ about 5000 light-years ⓘ
emits	hydrogen-alpha radiation ⓘ
excitedBy	ultraviolet radiation from massive O-type stars ⓘ
hasCentralCluster	open cluster NGC 6618 NERFINISHED ⓘ
hasColor	predominantly red in optical images ⓘ
hasShape	omega-shaped appearance ⓘ swan-like appearance ⓘ
hasSpectralType	H II emission ⓘ
includedInCatalog	Messier catalogue NERFINISHED ⓘ New General Catalogue NERFINISHED ⓘ
isRegionOf	active star formation ⓘ
isTargetFor	amateur astronomers ⓘ professional astronomical research ⓘ
locatedIn	Milky Way ⓘ Sagittarius Arm NERFINISHED ⓘ
locatedInConstellation	Sagittarius NERFINISHED ⓘ
locatedNear	Galactic plane ⓘ
observedIn	infrared wavelengths ⓘ optical wavelengths ⓘ radio wavelengths ⓘ
partOf	Milky Way galaxy NERFINISHED ⓘ
regionType	giant molecular cloud complex ⓘ
rightAscension	18h 20m ⓘ
visibleFrom	Earth NERFINISHED ⓘ

Referenced by (6)

Full triples — surface form annotated when it differs from this entity's canonical label.

Open cluster M17 → associatedWith → Swan Nebula ⓘ

this entity surface form: Horseshoe Nebula

Messier 17 → alsoKnownAs → Swan Nebula ⓘ

this entity surface form: Horseshoe Nebula

Omega Nebula → alsoKnownAs → Swan Nebula ⓘ

this entity surface form: Horseshoe Nebula