|
gptkbp:instanceOf
|
gptkb:planetary_nebula
|
|
gptkbp:addedToMessierCatalogueBy
|
gptkb:Charles_Messier
|
|
gptkbp:addedToMessierCatalogueIn
|
1764
|
|
gptkbp:alsoKnownAs
|
gptkb:Omega_Nebula
gptkb:Horseshoe_Nebula
gptkb:Lobster_Nebula
gptkb:Swan_Nebula
|
|
gptkbp:angularSize
|
11 arcminutes × 6 arcminutes
|
|
gptkbp:apparentMagnitude
|
6.0
|
|
gptkbp:catalogueNumber
|
gptkb:NGC_6618
gptkb:M17
|
|
gptkbp:contains
|
massive O-type stars
young open star cluster
|
|
gptkbp:declination
|
−16° 10′ 36″
|
|
gptkbp:diameter
|
~15 light years
|
|
gptkbp:discoveredBy
|
gptkb:Philippe_Loys_de_Chéseaux
|
|
gptkbp:discoveredIn
|
1745
|
|
gptkbp:distanceFromEarth
|
~5,000-6,000 light years
|
|
gptkbp:hasViewOf
|
astronomer
small telescopes
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Messier 17
|
|
gptkbp:ionizedBy
|
hot young stars
|
|
gptkbp:locatedIn
|
gptkb:constellation_Sagittarius
|
|
gptkbp:mass
|
~800 solar masses
|
|
gptkbp:notableFor
|
active star formation
bright emission nebula
|
|
gptkbp:observedBy
|
infrared
visible light
radio wavelengths
|
|
gptkbp:partOf
|
gptkb:Sagittarius_Arm_of_the_Milky_Way
|
|
gptkbp:rightAscension
|
18h 20m 26s
|
|
gptkbp:bfsParent
|
gptkb:Omega_Nebula
gptkb:Charles_Messier
|
|
gptkbp:bfsLayer
|
6
|