The period of time once the Sunlight is no more than six levels underneath the horizon at either sunrise or sunset. The horizon ought to be clearly outlined along with the brightest stars must be obvious under great atmospheric ailments (i.e. no moonlight, or other lights). One particular even now http://wallpaperhangerangieslist72592.blog5.net/36111375/the-wallpaper-installers-concord-nc-diaries