A supernova glowing in the dark 🌟⁣ ⁣ When supernova remnant SN 1006 first appeared in the sky in 1006 C.E., it was far brighter than Venus and visible during the daytime for weeks. From that moment on, it occupied the hearts of astronomers all over the world; it has been studied from the ground and from space many times.⁣ ⁣ In this image, visible, radio, and X-ray data combine to give us that blue (and red) view of the remnant’s full shell – the debris field that was created when a white dwarf star exploded and sent material hurtling into space.⁣ ⁣ Scientists believe SN 1006 is a Type Ia supernova. This class of supernova is caused when a white dwarf never lets another star go: either it pulls too much mass from a companion star and explodes, or it merges with another white dwarf and explodes. Understanding Type Ia supernovas is especially important because astronomers use observations of these explosions in distant galaxies as mileposts to mark the expansion of the universe.⁣ ⁣ I...