| gptkbp:instanceOf | gptkb:astronomer 
 | 
                        
                            
                                | gptkbp:abundantIn | protoplanetary disks molecular clouds
 outer solar system
 
 | 
                        
                            
                                | gptkbp:contains | H2O molecules 
 | 
                        
                            
                                | gptkbp:detectedOn | gptkb:Ceres gptkb:Enceladus
 gptkb:Mars
 gptkb:Mercury
 gptkb:Titan
 gptkb:Europa
 gptkb:the_Moon
 gptkb:Ganymede
 asteroids
 
 | 
                        
                            
                                | gptkbp:detects | gptkb:Herschel_Space_Observatory gptkb:Spitzer_Space_Telescope
 gptkb:Hubble_Space_Telescope
 gptkb:ALMA
 spectroscopy
 planetary rings
 exoplanet atmospheres
 star-forming regions
 ground-based telescopes
 circumstellar disks
 comet tails
 
 | 
                        
                            
                                | gptkbp:discoveredBy | 1969 
 | 
                        
                            
                                | gptkbp:existsIn | gptkb:water ice
 vapor
 
 | 
                        
                            
                                | gptkbp:firstDetectedBy | radio astronomy 
 | 
                        
                            
                                | gptkbp:foundIn | comets exoplanets
 moons
 planets
 star-forming regions
 interstellar clouds
 
 | 
                        
                            
                                | gptkbp:importantFor | astrobiology planetary science
 star formation
 
 | 
                        
                            
                                | gptkbp:requires | life as we know it 
 | 
                        
                            
                                | gptkbp:reservoirName | gptkb:Ceres gptkb:Earth
 gptkb:Enceladus
 gptkb:Mars
 gptkb:Titan
 gptkb:Europa
 gptkb:Ganymede
 gptkb:comet_67P/Churyumov–Gerasimenko
 
 | 
                        
                            
                                | gptkbp:scarceIn | inner solar system 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Montreal_Science_Centre 
 | 
                        
                            
                                | gptkbp:bfsLayer | 7 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Water in the Universe 
 |