| gptkbp:instanceOf | gptkb:Astronomical_object 
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                                | gptkbp:alternativeName | gptkb:SMBH 
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                                | gptkbp:canMerge | Yes 
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                                | gptkbp:charge | Neutral 
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                                | gptkbp:detects | Gravitational effects Accretion disk radiation
 Stellar orbits
 
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                                | gptkbp:distanceFromEarth | Exceeds speed of light 
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                                | gptkbp:emits | gptkb:Gravitational_waves No light directly
 
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                                | gptkbp:firstEvidence | 1960s 
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                                | gptkbp:formationTheories | Accretion of mass over time Collapse of massive gas clouds
 Merging of smaller black holes
 
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                                | gptkbp:hasEventHorizon | Yes 
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                                | gptkbp:location | Center of most massive galaxies 
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                                | gptkbp:notableExample | gptkb:M87* gptkb:Sagittarius_A*
 
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                                | gptkbp:range | 10^5 to 10^10 solar masses 
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                                | gptkbp:roleInGalaxy | Affects galaxy evolution Powers active galactic nuclei
 Powers quasars
 
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                                | gptkbp:size | Can be billions of kilometers across 
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                                | gptkbp:spin | Can be high 
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                                | gptkbp:studiedBy | gptkb:Event_Horizon_Telescope gptkb:X-ray_telescopes
 gptkb:Radio_telescopes
 
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                                | gptkbp:surroundedBy | Accretion disk 
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                                | gptkbp:surroundingRegion | Accretion disk Relativistic jets
 
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                                | gptkbp:type | Black hole 
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                                | gptkbp:bfsParent | gptkb:Quasar gptkb:Quasi-Stellar_Object
 
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                                | gptkbp:bfsLayer | 6 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Supermassive black hole 
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