| 
                                    
                                        gptkbp:instanceOf
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:scientific_instrument
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:category
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:scientific_instrument
                                        
                                         
                                    
                                        
                                            gptkb:navigation
                                        
                                         
                                    
                                        
                                            gptkb:historic_site
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:component
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:rule
                                        
                                         
                                    
                                        
                                            
                                            alidade
                                        
                                        
                                         
                                    
                                        
                                            
                                            mater
                                        
                                        
                                         
                                    
                                        
                                            
                                            rete
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:depictedIn
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:religious_art
                                        
                                         
                                    
                                        
                                            
                                            Renaissance art
                                        
                                        
                                         
                                    
                                        
                                            
                                            medieval manuscripts
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:displayedAt
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:British_Museum
                                        
                                         
                                    
                                        
                                            gptkb:Louvre_Museum
                                        
                                         
                                    
                                        
                                            gptkb:Museum_of_the_History_of_Science,_Oxford
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:etymology
                                    
                                 | 
                                
                                    
                                        
                                            
                                            Greek: 'astrolabos' (star-taker)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:hasType
                                    
                                 | 
                                
                                    
                                        
                                            
                                            linear astrolabe
                                        
                                        
                                         
                                    
                                        
                                            
                                            mariner's astrolabe
                                        
                                        
                                         
                                    
                                        
                                            
                                            planispheric astrolabe
                                        
                                        
                                         
                                    
                                        
                                            
                                            spherical astrolabe
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:influenced
                                    
                                 | 
                                
                                    
                                        
                                            
                                            European navigation
                                        
                                        
                                         
                                    
                                        
                                            
                                            development of planisphere
                                        
                                        
                                         
                                    
                                        
                                            
                                            development of sextant
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:influencedBy
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Ptolemaic_system
                                        
                                         
                                    
                                        
                                            gptkb:Islamic_science
                                        
                                         
                                    
                                        
                                            
                                            Greek astronomy
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:inventedBy
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:ancient_Greece
                                        
                                         
                                    
                                        
                                            gptkb:Hipparchus
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:material
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:wood
                                        
                                         
                                    
                                        
                                            
                                            brass
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:popularizedBy
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Islamic_astronomers
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:relatedTo
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:armillary_sphere
                                        
                                         
                                    
                                        
                                            
                                            quadrant
                                        
                                        
                                         
                                    
                                        
                                            
                                            planisphere
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:replacedBy
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:sextant
                                        
                                         
                                    
                                        
                                            gptkb:octant
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:shape
                                    
                                 | 
                                
                                    
                                        
                                            
                                            circular
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:usedBy
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:astronomer
                                        
                                         
                                    
                                        
                                            
                                            navigators
                                        
                                        
                                         
                                    
                                        
                                            
                                            astrologers
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:usedFor
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:navigation
                                        
                                         
                                    
                                        
                                            gptkb:astrology
                                        
                                         
                                    
                                        
                                            
                                            timekeeping
                                        
                                        
                                         
                                    
                                        
                                            
                                            measuring altitude of celestial bodies
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:usedIn
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Islamic_Golden_Age
                                        
                                         
                                    
                                        
                                            gptkb:ancient_China
                                        
                                         
                                    
                                        
                                            gptkb:medieval_Europe
                                        
                                         
                                    
                                        
                                            gptkb:ancient_Persia
                                        
                                         
                                    
                                        
                                            
                                            ancient India
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bfsParent
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Héloïse
                                        
                                         
                                    
                                        
                                            gptkb:Antiquity
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bfsLayer
                                    
                                 | 
                                
                                    
                                        
                                            
                                            6
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        https://www.w3.org/2000/01/rdf-schema#label
                                    
                                 | 
                                
                                    
                                        
                                            
                                            Astrolabe
                                        
                                        
                                         
                                    
                                 |