Orthographic projection of the reconstructed Planck all-sky y-map in Compton parameter units (Planck Collaboration XXII 2016). For illustration purposes and to enhance the thermal SZ signal-to-noise ratio, the y-map has been Wiener filtered. Positive sources in the map correspond to clusters and super-clusters of galaxies with strong thermal SZ emission. In particular, the Coma and Virgo clusters are clearly visible near the north Galactic pole. The region of strongest contamination from Galactic foreground emission in the Galactic plane has been partially masked.