Three-dimensional depiction of the orbits of Ulysses (solid black line), Jupiter (dashed ochre line), and Earth (dash-dotted blue line) in heliocentric ecliptic coordinates. The +x-direction points towards the vernal equinox, and the +z-direction points to ecliptic north. The Sun is marked as a yellow star. The faint grey curves on the coordinate planes are projections of Ulysses’ orbit onto that plane (see Fig. 3). The dark grey lines close to the almost-horizontal and vertical axes are projections of the homogeneous ISD inflow coming from (l, b) = (255.41° ,5.03° ) onto the xy- and xz-planes. (See Krüger et al. 2015, Fig. 1.)