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Fraser
2011-Apr-29, 10:00 PM
Green flashes from the Sun at sunset are a rare phenomenon, but even rarer are green flashes from a setting Moon. With the unique atmospheric conditions at Cerro Paranal in Chile, a photographer from ESO’s Very Large Telescope managed to what are likely the best images ever taken of the Moon’s green flash. ESO Photo [...]

More... (http://www.universetoday.com/85276/rare-green-flashes-captured-from-the-moon/)

profloater
2011-Apr-29, 10:15 PM
I think I saw a lensing effect by chance when a very low sun on the horizon was illuminating water drops suspended on a curved horizontal rail (of a trampoline). I was about 15 metres away and stationary when suddenly a row of green flashes came from the sequence of drops, just green, no other rainbow colours and once gone I could not find an angle to repeat it. I guess my sight line was about 40 degrees away from the sun ray.