Archive: https://archive.today/ylnQj From the post: >>Long ago, the core of a massive star collapsed, unleashing a shockwave that tore through the star, ripping it apart. As the shockwave reached the surface, it broke through with a burst of intense X-rays and ultraviolet light, sending a powerful pulse out into space. Now, 350 years later, that light has finally reached interstellar material, illuminating it, warming it, and causing it to emit a soft infrared glow.