The bubble has been created by a massive, bright blue star which is emitting a fast stellar wind of ionized gas. This wind is basically blowing bubbles by pushing surrounding material into a shell, which is then ionized and illuminated by the starlight. The nebula is 6 light years across and this image is an LRGB of 60:50:50:50 minutes using the Planewave scope and QSI 683 camera.