Circumhorizontal Arc Over Lindau, Germany
October 16, 2004
The photo above shows an eyecatching circumhorizontal arc and was captured near Lindau, Germany on June 30, 2004. The Sun, though not visible, is positioned above this arc. Circumhorizontal arcs and the more frequently observed circumzenithal arcs are complementary halos. See also tomorrow's Earth Science Picture of the Day.