Spatially resolved star formation history of Fornax. The data come from de Boer et al. (2012). The color indicates the star formation rate in the given radial and age bin. Each radial bin contains an almost equal number of stars. The edges of the radial bins are marked by the short red lines. The vertical dotted line marks the effective radius of the galaxy, the horizontal full line the assumed time of the MW-M 31 flyby (Banik et al. 2018), when the material of Fornax left the MW in our scenario.