Explanation: at the 13-14-15, on the nights of March 2012, the comet Garrad in his long journey while he was away AIn the ground, passing through the star fields of the constellation of the Dragon, approached prospectively the spiral galaxy NGC 4236 for a meeting very spectacular. Clearly visible on the cometary coma, the green color due to emissions of cyanide spilled by sublimation from the depths of the core.