Night Sky above a rapeseed flower field (Colza) in Saarland, Germany. Rapeseed oil or Colza is one of the oldest vegetable oils used in the history. Germany is one of the major producers of Colza. In the sky are stars of the Summer Triangle (Vega in Lyra at top, Deneb in Cygnus at left, and Altair in Aquila near the horizon). Lights of nearby towns appears as neighboring yellow light domes at the horizon.