booms . Hubble reveals the light from massive stars at various stages of star birth , while Spitzer shows where the relatively cooler gas and dust lie. Scale: Image is 13 arcmin across (about 600 light years across). Photo credit: X-ray: NASA/CXC/PSU/L.Townsley et al.; Optical: NASA/STScI; Infrared: NASA/JPL /PSU/L.Townsley et al.