When a massive star runs out of fuel, it starts cooling down and that causes the internal pressures to drop. Gravity wins out, and the star suddenly collapses creating enormous shock waves that cause the outer part of the star to explode. Glowing gases are ejected creating a variety of shapes in various colors around the stars. Seen here is a vast wreath of glowing gases which was ejected after a massive star went supernova around 11,000 years ago in the constellation of Vela, the Sails. The Vela SNR (supernova remnant) is an ideal target for wide-field astroimagers, as this spread of wispy threads spans 4.5° of sky and is captured in its entirety by the wide 10° fov of my Sigma 105mm lens. One of my favorite targets, the Pencil Nebula can be seen in the image, albeit very small, can you spot it?