Synthetic black hole images for Sgr A^* for a Kerr black hole with a_* = 0.94 (panels a–c), a Kerr black hole with a_* = 0.6 (panels d–f), a non-rotating dilaton black hole (panels g–i), and for a stable, non-rotating boson star (panels j–l). From left to right and for all rows: GRRT image (panels a, d, g, j), dynamically reconstructed image with interstellar scattering (including both diffractive and refractive scattering during the generation of the synthetic visibilities) using the EHT 2017 configuration convolved with 75% (red shading) of the nominal beam size (light grey shading, panels b, e, h, k), and dynamically reconstructed image with interstellar scattering (including both diffractive and refractive scattering during the generation of the synthetic visibilities) using the space-EHT configuration convolved with 75% (red shading) of the nominal beam size (light grey shading, panels c, f, i, l).