The Dolphin Nebula (Sharpless 2-308) is a vast bubble of glowing gas located about 5,200 light-years away in the constellation Canis Major. Spanning nearly 60 light-years across, the nebula was formed by the powerful stellar winds of a massive Wolf–Rayet star, which has blown material outward to create a huge shell of ionized oxygen. When imaged through specialized filters, the nebula shines with a distinctive soft blue glow, giving it the appearance of a cosmic bubble drifting through space.
Often nicknamed the “Dolphin Nebula” because of its curved structure that can resemble a leaping dolphin in wide-field images, Sh2-308 is a challenging but rewarding target for astrophotographers. Its faint emission requires long exposures and narrowband imaging to reveal the delicate arcs of gas surrounding the central star. The nebula represents a late stage in the life of a massive star, as intense stellar winds sculpt the surrounding interstellar material before the star eventually ends its life in a supernova explosion.
The Dolphin Nebula (Sharpless 2-308) is a vast bubble of glowing gas located about 5,200 light-years away in the constellation Canis Major. Spanning nearly 60 light-years across, the nebula was formed by the powerful stellar winds of a massive Wolf–Rayet star, which has blown material outward to create a huge shell of ionized oxygen. When imaged through specialized filters, the nebula shines with a distinctive soft blue glow, giving it the appearance of a cosmic bubble drifting through space.
Often nicknamed the “Dolphin Nebula” because of its curved structure that can resemble a leaping dolphin in wide-field images, Sh2-308 is a challenging but rewarding target for astrophotographers. Its faint emission requires long exposures and narrowband imaging to reveal the delicate arcs of gas surrounding the central star. The nebula represents a late stage in the life of a massive star, as intense stellar winds sculpt the surrounding interstellar material before the star eventually ends its life in a supernova explosion.