The Veil Nebula, also known as the Cygnus Loop, is a vast supernova remnant located in the constellation Cygnus. It was created when a massive star exploded several thousand years ago, sending an expanding shock wave through the surrounding interstellar medium. The delicate filaments visible today are formed as this shock front collides with clouds of gas, causing them to heat up and emit light. Rich in hydrogen and oxygen emission, the Veil Nebula provides a striking view of how supernova explosions shape and enrich the interstellar medium, distributing material that can later become part of future generations of stars and planets.