Veil Nebula-western segment (NGC 6960). Some 15,000 years ago , a Red Giant star exploded as a Type II Supernova (hydrogen present in the spectra). The supernova was likely visible to the naked eye for a month or so as the light of the explosion is 10 billion times brighter than the sun....The resulting debris is hurtling at some 100 km/sec and is the source of heavy elements such as iron, calcium, gold- we are the products of such ancient explosions....Another Supernova remnant is the Crab Nebula... The Veil is a challenge to see in a telescope and requires very dark skies and an O III filter. Summit County, CO, July 2006, Canon 30D,Pentax 105SHDF refractor f6.9 .