Sunrise devised a dual production with Studio Nue.
These two angles combine to define sunrise to occur when the Sun's center is 50 arcminutes below the horizon, or 90
 The offset between the dates of the solstice and the earliest or latest sunrise time is caused by the eccentricity of Earth's orbit and the tilt of its axis, and is described by the analemma, which can be used to predict the dates

