|
gptkbp:instanceOf
|
gptkb:Titan
supernova
|
|
gptkbp:angularSize
|
7×5 arcminutes
|
|
gptkbp:apparentMagnitude
|
8.4
|
|
gptkbp:cataloguedIn
|
gptkb:Charles_Messier
|
|
gptkbp:catalogueNumber
|
gptkb:M1
|
|
gptkbp:centralStarDiscoveredIn
|
1968
|
|
gptkbp:centralStarName
|
gptkb:Crab_Pulsar
|
|
gptkbp:centralStarPeriod
|
33 milliseconds
|
|
gptkbp:centralStarType
|
white dwarf
|
|
gptkbp:centralTo
|
gptkb:Crab_Pulsar
|
|
gptkbp:composition
|
dust
synchrotron radiation
ionized gas
|
|
gptkbp:contains
|
gptkb:Crab_Pulsar
|
|
gptkbp:diameter
|
~11 light-years
|
|
gptkbp:discoveredBy
|
gptkb:John_Bevis
|
|
gptkbp:discoveredIn
|
1731
|
|
gptkbp:distanceFromEarth
|
~6500 light-years
|
|
gptkbp:emits
|
gptkb:X-rays
gptkb:gamma_rays
gptkb:radio_waves
visible light
|
|
gptkbp:expandingAt
|
~1500 km/s
|
|
gptkbp:hasViewOf
|
optical wavelengths
X-ray wavelengths
infrared wavelengths
radio wavelengths
|
|
gptkbp:historicalObservation
|
recorded by Chinese astronomers in 1054
recorded by Japanese astronomers in 1054
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Crab Nebula (M1)
|
|
gptkbp:locatedIn
|
constellation Taurus
|
|
gptkbp:mass
|
~4.6 solar masses
|
|
gptkbp:notableFor
|
source of cosmic rays
first astronomical object identified with a historical supernova
prototype of plerion (filled-center supernova remnant)
studied across electromagnetic spectrum
used to calibrate X-ray telescopes
|
|
gptkbp:originatedIn
|
gptkb:supernova_SN_1054
|
|
gptkbp:otherName
|
gptkb:NGC_1952
gptkb:Taurus_A
|
|
gptkbp:partOf
|
gptkb:Messier_Catalogue
gptkb:NGC_Catalogue
|
|
gptkbp:shape
|
irregular
|
|
gptkbp:spectralType
|
gptkb:planetary_nebula
|
|
gptkbp:usedAs
|
standard candle in astronomy
|
|
gptkbp:visibleToNakedEye
|
with small telescopes
|
|
gptkbp:bfsParent
|
gptkb:Taurus_constellation
|
|
gptkbp:bfsLayer
|
5
|