2708 20160701171709.0 ASTROimport-865 Mecina, M. 2015 Dust in Stellar Winds: A Micro- and Macroscopic View In the course of the MESS Guaranteed Time Key Program, geometrically thin and overall spherically symmetric detached shells were observed with Herschel/PACS amongst a morphologically diverse sample of (post-)AGB stars. We use 1D dust radiative transfer modelling to determine shell properties such as the dust mass, the corresponding mass-loss rate (MLR) and dust temperature, in order to assess the possible scenarios of shell formation. As an example we present the case of the carbon star U Hya. For the modelling the chosen dust properties are crucial, and we show the key aspects and their effect on the results obtained. We further attempt to establish a physical model of the observed stellar dust envelope by means of a stationary wind code to test whether an abrupt change in the MLR can cause the observed detached shell. Groenewegen, M. A. T. Kerschbaum, F. Aringer, B. Nowotny, W. Ottensamer, R. Mayer, A. Luntzer, A. Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time 497 2015 395 http://esoads.eso.org/abs/2015ASPC..497..395M published in NONREF