| gptkbp:instanceOf | gptkb:supernova 
 | 
                        
                            
                                | gptkbp:age | about 10,000 to 20,000 years 
 | 
                        
                            
                                | gptkbp:angularSize | about 3 degrees 
 | 
                        
                            
                                | gptkbp:apparentMagnitude | 7.0 
 | 
                        
                            
                                | gptkbp:bestViewedIn | autumn (Northern Hemisphere) 
 | 
                        
                            
                                | gptkbp:bestViewedWith | gptkb:astronomer 
 | 
                        
                            
                                | gptkbp:catalogueNumber | gptkb:Caldwell_33 gptkb:Caldwell_34
 gptkb:Sharpless_103
 
 | 
                        
                            
                                | gptkbp:contains | gptkb:Eastern_Veil gptkb:NGC_6960
 gptkb:NGC_6974
 gptkb:NGC_6979
 gptkb:NGC_6992
 gptkb:NGC_6995
 gptkb:Pickering's_Triangle
 gptkb:Western_Veil
 gptkb:Witch's_Broom_Nebula
 
 | 
                        
                            
                                | gptkbp:discoveredBy | gptkb:William_Herschel 
 | 
                        
                            
                                | gptkbp:discoveredIn | 1784 
 | 
                        
                            
                                | gptkbp:distanceFromEarth | about 2,400 light-years 
 | 
                        
                            
                                | gptkbp:frequency | gptkb:sulfur hydrogen
 oxygen
 
 | 
                        
                            
                                | gptkbp:hasViewOf | gptkb:Northern_Hemisphere optical wavelengths
 X-ray wavelengths
 radio wavelengths
 
 | 
                        
                            
                                | gptkbp:locatedIn | gptkb:constellation_Cygnus 
 | 
                        
                            
                                | gptkbp:notableFeature | gptkb:planetary_nebula filamentary structure
 
 | 
                        
                            
                                | gptkbp:notableFor | colorful filaments complex shock waves
 
 | 
                        
                            
                                | gptkbp:origin | supernova explosion 
 | 
                        
                            
                                | gptkbp:otherName | gptkb:Cygnus_Loop gptkb:NGC_6960
 gptkb:NGC_6974
 gptkb:NGC_6979
 gptkb:NGC_6992
 gptkb:NGC_6995
 
 | 
                        
                            
                                | gptkbp:partOf | gptkb:Cygnus_Loop 
 | 
                        
                            
                                | gptkbp:photographed | gptkb:Spitzer_Space_Telescope gptkb:Chandra_X-ray_Observatory
 gptkb:Hubble_Space_Telescope
 
 | 
                        
                            
                                | gptkbp:publiclyAccessibleImages | gptkb:NASA 
 | 
                        
                            
                                | gptkbp:supernovaProgenitorMass | about 20 solar masses 
 | 
                        
                            
                                | gptkbp:supernovaType | core-collapse 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Cygnus 
 | 
                        
                            
                                | gptkbp:bfsLayer | 6 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Veil Nebula 
 |