Orthographic projections centred on the south Galactic pole of the Planck dust emission intensity, D₃₅₃ (left), and the Stokes Q₃₅₃ (centre) and U₃₅₃ (right) maps, at 353 GHz. A grid of Galactic coordinates is included, labelled in degrees. East is on the left of the maps and the west on the right. We note that the U₃₅₃ map is in the HEALPix (or CMB) polarization convention, which corresponds to −U₃₅₃ in the IAU convention.