Created by fast winds from a hot, this space "bubble" is huge. The nebula cataloged as Sharpless 2-308, and is at a distance of 5200 light years from Earth in the constellation Canis Major. The diameter of the bubble is approximately 60 light years. The massive Wolf-Rayet star, which has created a bubble - a star near the center of the nebula. Wolf-Rayet stars in twenty times the Sun's mass.