Hα projections of λ-Cephei-like astrospheres with ISM inflow speeds (from top to bottom) u_ISM ∈ {80, 40, 20, 10} km s⁻¹ onto the lb-plane; modelled in 2D (left), and in 3D projected face-on to the ecliptic (centre-left), edge on to the ecliptic (centre-right), and tail-on to the astrosphere (right). Hα radiance in [erg s⁻¹ cm⁻² sr⁻¹], angular extent in degrees. Taken with permission from Baalmann (2021, Fig. 4.19).