|
gptkbp:instanceOf
|
gptkb:galaxy
|
|
gptkbp:alternativeName
|
gptkb:Messier_31
gptkb:NGC_224
gptkb:Andromeda_Galaxy
|
|
gptkbp:apparentMagnitude
|
3.44
|
|
gptkbp:catalogueDate
|
1764
|
|
gptkbp:cataloguedIn
|
gptkb:Charles_Messier
|
|
gptkbp:collisionTimeEstimate
|
~4.5 billion years
|
|
gptkbp:contains
|
supernova remnants
globular clusters
open clusters
planetary nebulae
|
|
gptkbp:declination
|
+41° 16′ 9″
|
|
gptkbp:diameter
|
220,000 light-years
|
|
gptkbp:discoveredBy
|
gptkb:Abd_al-Rahman_al-Sufi
|
|
gptkbp:discoveredIn
|
964 CE
|
|
gptkbp:distanceFromEarth
|
2.537 million light-years
|
|
gptkbp:firstPhotographDate
|
1887
|
|
gptkbp:firstPhotographedBy
|
gptkb:Isaac_Roberts
|
|
gptkbp:futureCollisionWith
|
gptkb:Milky_Way
|
|
gptkbp:galacticLatitude
|
-21.573°
121.174°
|
|
gptkbp:galaxyType
|
gptkb:galaxy
|
|
gptkbp:hasSupermassiveBlackHole
|
present
~140 million solar masses
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
M31 (Andromeda Galaxy)
|
|
gptkbp:HubbleClassification
|
SA(s)b
|
|
gptkbp:locatedIn
|
gptkb:Andromeda_constellation
|
|
gptkbp:mass
|
1.5×10^12 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] ≈ -0.7
|
|
gptkbp:notableFeature
|
star-forming regions
dust lanes
stellar streams
double nucleus
satellite galaxies
extended halo
|
|
gptkbp:notableSupernova
|
SN 1885A
|
|
gptkbp:notableSupernovaDate
|
1885
|
|
gptkbp:partOf
|
gptkb:Local_Group
|
|
gptkbp:radialVelocity
|
-301 km/s
|
|
gptkbp:rating
|
~1 trillion
|
|
gptkbp:redshift
|
-0.001001
|
|
gptkbp:rightAscension
|
00h 42m 44.3s
|
|
gptkbp:rotationPeriod
|
~220 million years
|
|
gptkbp:satelliteGalaxies
|
gptkb:NGC_221
gptkb:NGC_205
gptkb:M32
gptkb:M110
|
|
gptkbp:visibleToNakedEye
|
yes
|
|
gptkbp:bfsParent
|
gptkb:Messier_catalogue
|
|
gptkbp:bfsLayer
|
6
|