The green flash is a rare optical phenomenon above the horizon directly at sunrise or sunset. The color is caused by green ...

The green flash is a rare, brief optical event of green, yellow, and sometimes blue that colors the horizon, occurring at ...

Swan" in 1865 when he saw a "dazzling emerald green" flash at sunrise over a distant mountain. Interestingly, however, Swan did not publish his observation until 1883 — the same year that people ...

This is the "green flash," which can sometimes be seen right after sunset or before sunrise. So what causes the green flash? Like many colorful spectacles in the sky, such as rainbows, the green ...