Pickerings Triangle from Kitt Peak . ... About 7,500 years ago that star exploded in a supernova leaving the Veil Nebula , also known as the Cygnus Loop. ... In images of the complete Veil Nebula , studious readers should be able to identify the Pickering's Triangle component pictured above, a component named for a famous astronomer and the wisp's approximate shape . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... A service of: LHEA at NASA / GSFC . ...