Waxing: The moon anytime before a full moon and after a new moon.Waning: the moon at any time after full moon and before new moon.Gibbous: convex at both edges, as the moon when more than half full.Crescent: a shape resembling a segment of a ring.
Aurora Borealis in Kitdalen, Norway. Canon camera, Nikon mm lens at 14 mm and f sec exposure, ISO Hope you enjoy! by Wayne Pinkston (via Atmospheric Phenomena: Beautiful Aurora Borealis on the night sky)
Victoria Falls is one of the Seven Natural Wonders of the World. Statistically speaking it is the largest waterfall in the world. This recognition comes from combining the height and width together to create the largest single sheet of flowing water.
A minor geomagnetic storm is in progress on April and this is sparking bright auroras around the Arctic Circle. A family of "aurora addicts" traveling through Boden, Sweden, took this picture of the display.