The HH 212 jet is seen in this WISE color image (blue 3.4 μm, green 4.6 μm, and red 22 μm) together with the 2MASS source J05434630–0104439 (IRS-D), which is very bright at mid-infrared wavelengths. The framed region contains the two protostars MMS and IRS-D, and the insert to the right shows the same region as observed by Herschel at 70/160 μm. It is seen that the Class 0 source MMS is only visible at far-infrared wavelengths with Herschel, where it dominates the Class I source IRS-D that in turn dominates at near- and mid-infrared wavelengths. North is up and east is left.