About the Green Flash
Green flashes are real (not illusory) phenomena seen at sunrise and sunset, when some part of the Sun
suddenly changes color (at sunset, from red or orange to green or blue). The word ``flash'' refers to
the sudden appearance and brief duration of this green color, which usually lasts only a second or two
at moderate latitudes. As the area that turns green is ordinarily near the limit of the eye's
resolution, these are sometimes called ``green dot'' displays. There are several quite different
phenomena commonly lumped together under the name of ``the green flash'', and this intermingling
of disparate phenomena has fostered confusion. So I prefer to say ``green flashes'' and avoid the
definite article. For more information on the green flash and many more pictures go to: the green flash page