Four galaxies from the CALIFA survey. The top row shows SDSS images of the galaxies. The center row shows a map of the average stellar velocity within the galaxy; in blue regions, stars are, on average, moving towards us, in red regions, away from us. The bottom row shows whether motion is uniform or mixed – whether stars mostly follow the average motion or whether there are marked deviations from the average. Credit: CALIFA-Team / L. Zhu (MPIA)