This gas-dust cloud, NGC 7129, lies 3300 l.y. from Earth. The rose tint comes from heated dust, the green from carbon monoxide. The colors involved in the image are from these wave bands: 3.6 µm = blue; 4.5 µm = green; 5.8 µm = orange; 8.0 µm = red.
You can learn more about Galaxies and Stars outside the visible light range by clicking here.