From top to bottom: IRAC 8 μm (after stellar subtraction), MIPS 24 μm, PACS 70 μm (left column) and PACS 100 and 160 μm and SPIRE 250 μm (right column) images of NGC 891. Each panel shows an area of ~14′ × 7′ centred on the galaxy’s radio continuum coordinates α = 2^h22^m330, δ = 42°20′572 (J2000.0, blue cross; Oosterloo et al. 2007). The main beam size is indicated by the filled blue circle (FWHM: 2′′, 6′′, 6′′, , 11′′, ) and images have pixels sizes of ,, , 2′′, 3′′ and 6′′. The white arrow in the top right corner shows the Z-axis (i.e. the axis parallel to the short side of the instrument field of view) of the spacecraft during observations. The sky rms noise is σ = 0.03,0.03,1.06,1.23,0.78, and 1.31 MJy sr^-1. Contours are shown at 3, 10, 100, 200, and 1000σ over all images. North and west directions are indicated.