N14, a bubble possibly in the process of opening. The bubble is bright where it is adjacent to dense material, and opens in the direction of low density. Left: contours of the 870 μm emission superimposed on an unsharp-masked image at 8.0 μm. We see the filaments shaped at the surface of the bubble by the ionized gas flowing out (870 μm emission: σ = 0.04 Jy/beam; the contour levels are 1, 2, 5, 10, 15, 20, and 25σ); right: Spitzer-GLIMPSE 8.0 μm emission in turquoise and Spitzer-MIPSGAL 24 μm emission in red.