Galactocentric velocity components of the Gaia DR2 sample of 15 681 sources (in light grey). Sources with a ratio between the value of the parallax and its uncertainty >1 (1150) are plotted in black. The clustering centred at (U, V)∼(−50, −200) km s⁻¹ corresponds to the Large Magellanic Cloud – (U, V, W)∼(−58, −221, 209) km s⁻¹ – (mostly) and the Small Magellanic Cloud – (U, V, W)∼(26, −178, 175) km s⁻¹ (values corrected for the Solar motion and the local standard of rest from those in Gaia Collaboration 2018b).