Daylight in Anchorage

Transit of the Sun is local solar (sundial) noon.

Civil twilight is when the center of the Sun is geometrically 6 degrees below the horizon. This is the limit at which twilight illumination is sufficient, under good weather conditions, for terrestrial objects to be clearly distinguished; during civil twilight, the horizon is clearly defined and the brightest stars are visible under good atmospheric conditions in the absence of moonlight or other illumination. In the morning before or after civil twilight, artificial illumination is normally required to carry on ordinary outdoor activities.

Nautical twilight is when the center of the sun is geometrically 12 degrees below the horizon. During nautical twilight, under good atmospheric conditions and in the absence of other illumination, general outlines of ground objects may be distinguishable, but detailed outdoor operations are not possible. During nautical twilight the illumination level is such that the horizon is still visible even on a Moonless night allowing mariners to take reliable star sights for navigational purposes, hence the name.