Messier 8

E103071

Messier 8, also known as the Lagoon Nebula, is a large, bright emission nebula and active star-forming region visible in the constellation Sagittarius.

All labels observed (1)

Label Occurrences
Messier 8 canonical 3

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf H II region
Messier object
NGC object
emission nebula
star-forming region
alsoKnownAs Lagoon Nebula
M8
NGC 6523
angularSize 90 × 40 arcminutes
apparentMagnitudeV 5.0
bestSeenInMonth July
cataloguedBy Charles Messier
contains Bok globules
Hourglass Nebula region
surface form: Hourglass Nebula

dark nebulae
Open cluster NGC 6530
surface form: open cluster NGC 6530
declination −24° 23′
discoveredBy Giovanni Battista Hodierna
discoveryYear 1654
distanceFromEarth 1250 parsecs
4100 light-years
dominantEmissionLine H-alpha
[O III]
excitedBy massive O-type stars
hasAlternativeDesignation LBN 25
Sh 2-25
hasFeature bright emission core
dark lanes of dust
surrounding reflection nebulosity
hasNotableStar 9 Sagittarii
Herschel 36
hasPhysicalSize 110 light-years
hasRegion Hourglass region
hasSpectralType H II emission spectrum
isInGalacticQuadrant Sagittarius Arm
surface form: Sagittarius–Carina arm region
isPartOf Sagittarius Star Cloud
surface form: Sagittarius star cloud region
isTypeOf diffuse nebula
isVisibleFrom Northern Hemisphere
Southern Hemisphere
locatedIn Milky Way
Sagittarius Arm
locatedInConstellation Sagittarius
messierNumber M8
ngcNumber NGC 6523
observedInWavelength infrared
optical
radio
rightAscension 18h 03m

How these facts were elicited

Referenced by (3)

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

Sagittarius contains Messier 8
Open cluster NGC 6530 associatedWith Messier 8
subject surface form: NGC 6530
Lagoon Nebula alsoKnownAs Messier 8