The dead star's spectral nature definitely fits the mood of the season.
, runs out of the hydrogen and helium fuel required to stave off collapse. Drawn in by the intensity of its own gravity, and without the energy from nuclear fusion holding it up, the outer layers of the star very rapidly collapse in on the core. It is believed that the outer layers then smash into the core, compressing the electrons and protons of the heavy elements in the core into neutrons.
These outer layers then rebound off the newly formed ball of neutrons at its center, leaving behind a, an object that packs in the mass of a sun-like star into a volume roughly the size of a small city.
As for those rebounding outer layers, in the case of the Vela supernova remnant, this superheated material expanded into the surrounding cloud of interstellar gas, creating the web-like structure of bright filaments we see in the image. The Vela supernova remnant is named after the constellation Vela , located in the southern hemisphere, and was produced by a supernova estimated to have occurred around 11,000 years ago. Being just 800 light-years from
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