  We present deep maps of dust emission from the edge-on spiral galaxy NGC 891,
obtained with the ISOPHOT instrument on board the Infrared Space Observatory in
broad band filters with reference wavelengths centered on 170 and 200 micron.
Using new processing methods to remove the effects of detector transients from
the data, we detect cold dust at high dynamic range. The observed surface
brightness distribution and colour profile of the far-infrared (FIR) emission
are found to be in good agreement with predictions for their counterparts
derived from the model of Popescu et al. (2000a). Thus, NGC 891 is the first
galaxy for which an intrinsic distribution of dust and stars could be found
which simultaneously accounts for both the optical/near-IR and FIR
morphologies.
